Re: [Bug 1007765] Re: brightness adjusting crashes system

2013-08-22 Thread Marwan Tanager
On Thu, Aug 22, 2013 at 06:10:50PM -, Aditya wrote:
> May be the community is looking for the solution in the wrong direction.

Well, I will elaborate on this bug once and for all.

First of all, we can't blame the Linux kernel for this bug, because it is 
firmware-specific.

"firmware-specific" means that the peace of software (i.e., the backlight 
driver) causing this bug is written by the affected systems manufacturers 
(Dell, HP, etc.), and burned into the BIOS ROM chips of those systems. This 
software is closed-source, so there is no way to fix it, other than via 
firmware updates provided by the manufacturers.

The freeze happens at the time of the interaction between the Linux kernel and 
the backlight driver provided by the firmware. Basically, It happens as 
follows:

- The user adjust the brightness using the keyboard hot keys, or a 
  software application (e.g., gnome-control-center).

- In the first case, The X window system provides a prioritized 
  list of backlight drivers interfaces (exported by the Linux 
  kernel under /sys/class/backlight/) that are used for 
  handling the keyboard key presses. The highest priority 
  interface, which are present on the system, is used.
  
- In the second case, the software application just selects the 
  interface to use for adjusting the brightness from the 
  currently available interfaces under /sys/class/backlight/

- Depending on the driver underlying the interface selected at the 
  previous step, the system may or may not enter SMM (System Management 
  Mode) to adjust the brightness. SMM is an operational mode which the 
  system enters when it wants to run critical firmware (e.g., the peace 
  of software responsible for shutting down the system when the 
  processor temperature hit a critical threshold, or in our case, the 
  peace of software responsible for adjusting the brightness level, 
  etc). When the system is executing software in SMM, it is no longer 
  under the control of the Linux kernel, and is fully controlled by the 
  firmware executed.

  The video0_acpi and the dell_backlight (or whatever it's called on 
  systems other than Dell) interfaces under /sys/class/backlight/, are 
  interfaces, exported by the Linux kernel, for firmware drivers that 
  execute in SMM.  So if they are selected in the previous step, the 
  system is going to enter SMM for adjusting the brightness. On the 
  other hand, the intel_backlight interface on systems with Intel 
  Graphics is just an interface for the Linux kernel driver responsible 
  for adjusting the backlight level of the intel graphics chip. It is 
  executed just like any other driver in the Linux kernel, without the 
  need to enter special modes like SMM. So, if this driver is buggy, we 
  can say that the Linux kernel is buggy, because it is considered part 
  of the kernel. So, we have two cases:

1. The driver underlying the interface selected (by the X 
   window system or the software application used for adjusting 
   the brightness) is firmware. In this case, when adjusting 
the 
   brightness, the Linux kernel just instructs the processor to 
   enter SMM in order to execute the instructions of this 
   driver, and when finished, it takes control back on the 
   system.

2. The driver underlying the interface selected, is the Linux 
   kernel driver for the graphics chip. In this case, when 
   adjusting the brightness, this driver, provided by the Linux 
   kernel, is responsible for doing the job, while the system 
   is fully controlled by the Linux kernel, and without the 
   need for entering any special modes like SMM for executing 
   opaque firmware.

  In case 1, we have a problem, because the kernel has another driver, 
  exported via /proc/sys/kernel/nmi_watchdog, that uses a hardware 
  timer to periodically issue signals called NMIs (Non-Maskable 
  Interrupts) every second or two.

  If an NMI is emitted while the system is operating in SMM, the buggy 
  firmware executing in SMM causes the system to freeze.

  In case 2, we are fine, because there is no buggy firmware
involved.

The apci_backlight=vendor solution is not reliable, because all it does is to 
instruct the Linux kernel to not export the acpi_video0 interface, which is the 
interface for the BIOS ACPI backlight driver that is executed from SMM. But, it 
also instructs the kernel to export

Re: [Bug 1007765] Re: brightness adjusting crashes system

2013-08-23 Thread Marwan Tanager
On Fri, Aug 23, 2013 at 09:05:34AM -, Aditya wrote:
> Thanks Marwan for the detailed description of the bug.

You're welcome.

> I just posted this as a fix for the users who were unable to change
brightness, and I had no idea how deep the roots of this bug are.

And, I don't blame you. I just took it as an oppurtunity for explaining the 
root cause of the problem in order to reduce the amount of trial-and-error for 
poeple experiencing the same problem.

> In my case, both acpi_video0 and acpi_video1 do not work, i.e. the brightness 
> does not change and the system is functional.
> When I use acpi_backlight=vendor things are different even if I disable 
> nmi_watchdog .

But this thread is about the problem of the freeze that happens on some systems 
when adjusting the brightness, not about the issue of the brightness controls 
not working, while the system is functional. Disabling nmi_watchdog just makes 
us avoid this freeze. You are talking about a different issue here.  Maybe you 
need to open a new bug report for this problem.

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Re: [Bug 1007765] Re: brightness adjusting crashes system

2013-08-23 Thread Marwan Tanager
On Fri, Aug 23, 2013 at 04:09:46PM -, Aditya wrote:
> Hi,
> by different I mean that the system freezes in both the situations, with 
> nmi_watchdog enabled and disabled, and this happens as soon as I soon as I 
> change the brightness levels, and this is the reason I actually reached this 
> bug report.

Then, let's do some testing.

Could you please do the following:

- Boot the system with acpi_backlight=vendor

- sudo echo 0 >/proc/sys/kernel/nmi_watchdog

- cat /proc/sys/kernel/nmi_watchdog (make sure the output is 0)

- Try changing the brightness using the keyboard keys, and see whether 
  a freeze would happens or not.

Note that if you just put echo 0 >/proc/sys/kernel/nmi_watchdog in 
/etc/rc.local, then you are going to need to reboot the system in order for the 
script to be executed.

If a freeze still happens, then my guess is that there is another source of 
NMIs on your system other than nmi_watchdog that still conflicts with the 
vendor firmware backlight driver.

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[Bug 1021375] Re: Nautilus says the USB stick is read only when it is not

2013-08-25 Thread Marwan Tanager
I have the same issue on Ubuntu 13.04 and was able to workaround it
using the Christophe's trick from comment #22

Thanks, Christophe, but we would like to know the rationale behind your
workaround, in order to better know why the bug happens at the first
place.

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  Nautilus says the USB stick is read only when it is not

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[Bug 1098525] [NEW] Can't complete resume from hibernation unless +i or +e is pressed.

2013-01-11 Thread Marwan Tanager
Public bug reported:

I have Ubuntu 12.10 installed on my Dell Inspiron M5010 Core i3 machine.

When I use pm-hibernate, the computer hibernates successfully, and when
resuming it, the process completes to 100%, but after that nothing seems to
happen, and I stay in the black-and-white text mode screen without any further
activity.

On an attempt to escape this apparent freeze, I tried to press the magic
sequence  + i, and to my surprise, graphics mode is back again to
the same state before hibernation just like one would expect from a normal
resume.

I tried the whole sequence again with  + e, and the same thing
happened (resume completes only after the key combination is pressed).

Actually I am not sure the bug is caused by pm-utils, because after the key
combination is pressed, everything seems to be normal, which means that 
pm-hibernate did it's job, but for now, it is the most relevant package as far 
as I
can tell. 

If you need any further info or testing that may be helpful, I'm willing to
cooperate.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: pm-utils 1.4.1-9
ProcVersionSignature: Ubuntu 3.5.0-21.32-generic 3.5.7.1
Uname: Linux 3.5.0-21-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.6.1-0ubuntu9
Architecture: amd64
Date: Fri Jan 11 13:02:19 2013
InstallationDate: Installed on 2010-07-29 (896 days ago)
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: pm-utils
UpgradeStatus: Upgraded to quantal on 2013-01-06 (5 days ago)

** Affects: pm-utils (Ubuntu)
 Importance: Undecided
 Status: New


** Tags: amd64 apport-bug quantal

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  Can't complete resume from hibernation unless +i or
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[Bug 1098525]

2013-01-11 Thread Marwan Tanager
It turned out that the problem is in uswsusp. pm-utils uses s2disk and s2ram 
from the uswsusp package for hibernation and suspension, and only resorts to 
the kernel as a back-end if this package (or the tuxonice patch) is not 
installed.

I purged the package and after that pm-hibernate worked as expected without any 
hangs.


** Package changed: pm-utils (Ubuntu) => uswsusp (Ubuntu)

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[Bug 890784]

2013-01-29 Thread Marwan Tanager
As a workaround, there is another terminal emulator called 'terminator' that is 
based on the same virtual terminal widget used by gnome-terminal but doesn't 
suffer from this problem. Basically, it's the same as gnome-terminal, but with 
many more advanced features.

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  Gnome-terminal continues to show outline cursor after getting focus

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[Bug 890784]

2013-01-29 Thread Marwan Tanager
On Tue, Jan 29, 2013 at 05:36:59PM -, Matt Hellige wrote:
> #12 is incorrect. AFAICS, this is actually a libvte bug and all libvte-
> based terminals suffer from this issue on my 12.04 machine. I've used
> gnome-terminal, terminator, sakura, and I think evilvte and lilyterm as
> well.
> 
> FWIW, I haven't yet tried 12.10.
> 

It's correct on 12.10.

This is the version of terminator on my system:

marwan@host:~$ terminator --version
terminator 0.96

Actually, I had installed terminator out of frustration with this bug almost a 
month ago, and it hasn't shown any sign for this issue since then. That's why I 
stayed with it.

May be you're using a version less than 0.96 where this issued apparently got 
fixed.

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[Bug 846367] Re: When opening a directory with totem, video files are added to the playlist but some of them won't play

2011-10-07 Thread Marwan Tanager
I just tested that bug against the development version of oneiric (the
7-oct-2011 build) and everything is fine. All the files are loaded into
the playlist and are played normally.

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  When opening a directory with totem, video files are added to the
  playlist but some of them won't play

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[Bug 1052210] [NEW] mail-notification checks every new message after every reboot

2012-09-17 Thread Marwan Tanager
Public bug reported:

Usually I have a lot of unread messages in more than one mailbox on my system, 
and I've added those mailboxes to mail-notification. 
When a new message arrives, a pop-up notification allows me to know of the new 
message and that's OK.

The problem happens when I reboot the system (or just restart the
notifier daemon for whatever reason); mail-notification would then check
for every unread message in each mailbox and notify me for every one of
them. So, suppose I've 100 unread messages scattered around the
mailboxes, and with my configuration of 15 seconds pop-up duration, this
amounts to 25 minutes worth of pop-up notifications which is "REALLY"
annoying.

I normally would think that if mail-notification have notified me before
for an unread message, then, in general, it shouldn't notify me again
for the same message, even after the daemon has been started (like when
rebooting the machine). But, if that behavior is considered normal (and
I doubt that for a user who always have busy mailboxes), then at least
there should be an option that lets the user tell the daemon explicitly
that he/she wants to be notified of any unread messages in the mailboxes
after starting the daemon.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: mail-notification 5.4.dfsg.1-2ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-24.43-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
Architecture: amd64
Date: Mon Sep 17 23:31:25 2012
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.utf8
SourcePackage: mail-notification

** Affects: mail-notification (Ubuntu)
 Importance: Undecided
 Status: New


** Tags: amd64 apport-bug lucid

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  mail-notification checks every new message after every reboot

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[Bug 1052210] Re: mail-notification checks every new message after every reboot

2012-09-17 Thread Marwan Tanager
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  mail-notification checks every new message after every reboot

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[Bug 1091965]

2013-04-05 Thread Marwan Tanager
I confirm this bug, too on Ubuntu 12.10. It renders the entire application 
useless, because a location can't be added initially.

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  weather applet: disabled OK button in configuration

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[Bug 1007765] Re: brightness adjusting crashes system

2013-01-07 Thread Marwan Tanager
I have the same issue on a Dell Inspiron M5010.

The workaround in comment #71 works for me too. pcie_aspm=force is
irrelevant here, though. acpi_backlight is the one that did the trick.

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  brightness adjusting crashes system

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[Bug 1023964] Re: apport-collect has missing dependence: launchpadlib Python

2013-01-07 Thread Marwan Tanager
For someone who wants to use apport-collect, is there any workaround?

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  apport-collect has missing dependence: launchpadlib Python

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[Bug 1023964] Re: apport-collect has missing dependence: launchpadlib Python

2013-01-08 Thread Marwan Tanager
Sorry, I meant apport-cli, not apport-collect. That's becuase I got the
same error noted in the bug description when I ran the command: apport-
cli -u 

I have python-launchpadlib already installed and apport-collect worked
fine for me when I tried it. Thanks.

As far as I understand from the man pages, the two commands are
equivalent.

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[Bug 890784] Re: Gnome-terminal continues to show outline cursor after getting focus

2013-01-08 Thread Marwan Tanager
No, I just upgraded to 12.10 a couple of days ago, and I encountered the
same issue multiple times. Actually I'am here because I was going to
file a bug report against gnome-terminal.

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[Bug 1069132]

2013-01-08 Thread Marwan Tanager
I have the same issue since upgrading to 12.10. Hibernating using s2disk used 
to work fine most of the time in 10.04, but know it's totally broken. s2ram 
works without problems, though.


Marwan

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  cannot resume from hibernate

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Re: [Bug 1007765] Re: brightness adjusting crashes system

2013-06-22 Thread Marwan Tanager
On Sat, Jun 22, 2013 at 11:07:27PM -, Savio wrote:
> I have Dell inspiron with Intel core I3 and Intel HD graphics with ubuntu. 
> 13.04 .
> I tried setting acpi_backlight=vendor but no help
> but setting acpi = off works but no touchpad support
> 
> setting brightness manually in /sys/class/backlight/dell_ brightness/
> current* to 1 works and also changing this setting multiple times works
> great

This is actually a kernel bug (actually a firmware bug specific to your 
machine) that is supposed to be fixed upstream by now (by just disabling the 
interface for the firmware backlight driver).  I think the fix will be 
available starting from 3.10.

For more info, see https://bugzilla.kernel.org/show_bug.cgi?id=57571

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[Bug 1007765] Re: brightness adjusting crashes system

2013-06-22 Thread Marwan Tanager
** Bug watch added: Linux Kernel Bug Tracker #57571
   http://bugzilla.kernel.org/show_bug.cgi?id=57571

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Re: [Bug 1007765] Re: brightness adjusting crashes system

2013-06-22 Thread Marwan Tanager
On Sat, Jun 22, 2013 at 11:07:27PM -, Savio wrote:
> I have Dell inspiron with Intel core I3 and Intel HD graphics with ubuntu. 
> 13.04 .
> I tried setting acpi_backlight=vendor but no help
> but setting acpi = off works but no touchpad support

You can eliminate this problem for now, by putting this line in your 
/etc/rc.local:

echo 0 >/proc/sys/kernel/nmi_watchdog

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Re: [Bug 1007765] Re: brightness adjusting crashes system

2013-06-22 Thread Marwan Tanager
On Sun, Jun 23, 2013 at 04:59:03AM -, Savio wrote:
> Thats help, but adding this line in /etc/rc.local before exit 0 statement 
> making brigthness hotkey unusable.

This couldn't be caused by disabling nmi_watchdog; this is totally
unrelated.

My guess is that you've booted the system with acpi_backlight=vendor which
disabled the ACPI backlight interface (/sys/class/backlight/acpi_video0), and
enabled the interface for the vendor backlight driver (e.g.,
/sys/class/backlight/dell_backlight) which won't be picked up by X, because
it's not hard-coded to use it. So, you ended up with no backlight interface for
X to use. That's why the hotkeys seem to be not working.

Try booting the kernel without acpi_backlight=vendor, while disabling
nmi_watchdog from /etc/rc.local as before, and let's see what would happen.

> will adding this

> Section "Device"
> Identifier  "Intel Graphics"
> Driver  "intel"
> Option  "AccelMethod" "sna"
> Option  "Backlight"   "intel_backlight"
> Identifier  "Card0"
> Driver  "intel"
> BusID   "PCI:0:2:0"
> EndSection

Yes, I think this would help, but I haven't tried it before.

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[Bug 846367] [NEW] When opening a directory with totem, video files are added to the playlist but some of them won't play

2011-09-10 Thread Marwan Tanager
Public bug reported:

I put all my movies under one directory, each movie is in it's own
subdirectory. When I open the parent directory which contains all the
movies subdirectories ($ totem my_movies_directory), all the video files
in the tree are added to the playlist. Navigating through the playlist,
though, I have found that when playing some files, totem shows "Playing
0:00" in the status bar and nothing is played. All files are played
normally when opening their respective subdirectories directly, though.
I copied all the video files and put them directly under one directory
and tried opening that directory with totem and the same thing has
happened with no apparent reason. Nothing is dumped to the shell. I
think that would be a bit annoying for someone wanting to put some set
of files under a specific directory directly in the playlist by opening
that directory, rather than having to open each subdirectory  and
enqueue it's video files to the playlist.

** Affects: totem (Ubuntu)
 Importance: Undecided
 Status: New

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  When opening a directory with totem, video files are added to the
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[Bug 846367] Re: When opening a directory with totem, video files are added to the playlist but some of them won't play

2011-09-10 Thread Marwan Tanager
apport information

** Tags added: apport-collected

** Description changed:

- I put all my movies under one directory, each movie is in it's own
- subdirectory. When I open the parent directory which contains all the
- movies subdirectories ($ totem my_movies_directory), all the video files
- in the tree are added to the playlist. Navigating through the playlist,
- though, I have found that when playing some files, totem shows "Playing
- 0:00" in the status bar and nothing is played. All files are played
- normally when opening their respective subdirectories directly, though.
- I copied all the video files and put them directly under one directory
- and tried opening that directory with totem and the same thing has
- happened with no apparent reason. Nothing is dumped to the shell. I
- think that would be a bit annoying for someone wanting to put some set
- of files under a specific directory directly in the playlist by opening
- that directory, rather than having to open each subdirectory  and
- enqueue it's video files to the playlist.
+ I put all my movies under one directory, each movie is in it's own 
subdirectory. When I open the parent directory which contains all the movies 
subdirectories ($ totem my_movies_directory), all the video files in the tree 
are added to the playlist. Navigating through the playlist, though, I have 
found that when playing some files, totem shows "Playing 0:00" in the status 
bar and nothing is played. All files are played normally when opening their 
respective subdirectories directly, though. I copied all the video files and 
put them directly under one directory and tried opening that directory with 
totem and the same thing has happened with no apparent reason. Nothing is 
dumped to the shell. I think that would be a bit annoying for someone wanting 
to put some set of files under a specific directory directly in the playlist by 
opening that directory, rather than having to open each subdirectory  and 
enqueue it's video files to the playlist.
+ --- 
+ Architecture: amd64
+ DistroRelease: Ubuntu 10.04
+ InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
+ Package: totem 2.30.2-0ubuntu1
+ PackageArchitecture: amd64
+ ProcEnviron:
+  PATH=(custom, user)
+  LANG=en_US.utf8
+  SHELL=/bin/bash
+ ProcVersionSignature: Ubuntu 2.6.32-24.43-generic 2.6.32.15+drm33.5
+ Tags: lucid
+ Uname: Linux 2.6.32-24-generic x86_64
+ UserGroups: adm admin cdrom dialout fuse lpadmin netdev plugdev sambashare

** Attachment added: "Dependencies.txt"
   
https://bugs.edge.launchpad.net/bugs/846367/+attachment/2383054/+files/Dependencies.txt

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Title:
  When opening a directory with totem, video files are added to the
  playlist but some of them won't play

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[Bug 846367] GstreamerVersions.txt

2011-09-10 Thread Marwan Tanager
apport information

** Attachment added: "GstreamerVersions.txt"
   
https://bugs.edge.launchpad.net/bugs/846367/+attachment/2383055/+files/GstreamerVersions.txt

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Title:
  When opening a directory with totem, video files are added to the
  playlist but some of them won't play

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[Bug 846367] LogAlsaMixer.txt

2011-09-10 Thread Marwan Tanager
apport information

** Attachment added: "LogAlsaMixer.txt"
   
https://bugs.edge.launchpad.net/bugs/846367/+attachment/2383056/+files/LogAlsaMixer.txt

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Title:
  When opening a directory with totem, video files are added to the
  playlist but some of them won't play

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[Bug 846367] XorgLog.txt

2011-09-10 Thread Marwan Tanager
apport information

** Attachment added: "XorgLog.txt"
   
https://bugs.edge.launchpad.net/bugs/846367/+attachment/2383057/+files/XorgLog.txt

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Title:
  When opening a directory with totem, video files are added to the
  playlist but some of them won't play

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[Bug 846367] Re: When opening a directory with totem, video files are added to the playlist but some of them won't play

2011-09-11 Thread Marwan Tanager
Here the output. It is attached in the file named 'log'.  I noted that
the too many 'mp3parse' warnings are generated when I've tried to play
the files that totem can't play.

** Attachment added: "log"
   
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/846367/+attachment/2385121/+files/log

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Title:
  When opening a directory with totem, video files are added to the
  playlist but some of them won't play

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[Bug 846367] Re: When opening a directory with totem, video files are added to the playlist but some of them won't play

2011-09-11 Thread Marwan Tanager
sorry, I meant noticed (not noted)

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Title:
  When opening a directory with totem, video files are added to the
  playlist but some of them won't play

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[Bug 846367] Re: When opening a directory with totem, video files are added to the playlist but some of them won't play

2011-09-11 Thread Marwan Tanager
Navigating through all the files in the playlist I noticed that a line,
like the one below, is the common denominator with all the files that
couldn't be played:

0:01:32.405488455  2193   0xe46160 WARN   
  ffmpeg
gstffmpegdec.c:2215:gst_ffmpegdec_frame: ffdec_mpeg4:
decoding error (len: -1, have_data: 0)

with ffdec_mpeg4 is changed to ffdec_ depending on the file
type.


** Attachment added: "log"
   
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/846367/+attachment/2385353/+files/log

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Title:
  When opening a directory with totem, video files are added to the
  playlist but some of them won't play

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[Bug 846367] Re: When opening a directory with totem, video files are added to the playlist but some of them won't play

2011-09-17 Thread Marwan Tanager
I will report back as soon as I do the test.

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Title:
  When opening a directory with totem, video files are added to the
  playlist but some of them won't play

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