Ouch! That was formatted so badly (though it looked fine in the editor)
that I'm trying to replace the uglies now.
-- hendrik
On Fri, 28 Oct 2011 18:10:57 +0000, Hendrik Boom wrote:
> On Sun, 25 Sep 2011 13:24:11 +0000, Camaleón wrote:
>
>> On Sat, 24 Sep 2011 20:19:49 +0000, Hendrik Boom wrote:
>>
>> (...)
>>
>>> Playback failure:
>>> DVDRead could not open the disc "/dev/dvd". Your input can't be
>>> opened: VLC is unable to open the MRL 'dvd:///dev/dvd'. Check the log
>>> for details.
>>>
>>> Now there appears to be no /dev/dvd, as tetified by ls in another
>>> shell window:
>>>
>>> hendrik@notlookedfor:~$ ls -l /dev/dvd ls: cannot access /dev/dvd: No
>>> such file or directory hendrik@notlookedfor:~$
>>>
>>> So the first step seems to be to find out why there's no /dev/dvd.
>>
>> That's weird...
>>
>> sm01@stt008:~$ ls -l /dev/dvd
>> lrwxrwxrwx 1 root root 3 sep 25 11:13 /dev/dvd -> sr0
>>
>> Does the system detect the insertion of the DVD? I mean, can you see an
>> icon on the desktop or something under "/media/*"?
>>
>>> But I did find a device /dev/video0.
>>
>> Hum... this is usually for webcams or video cameras, not DVDs.
>>
>> What's the out put of "ls -la /dev/video0" and "dmesg|grep -i dvd"?
>>
>> (...)
>>
>>> Not sure where to go next. An I missing device drivers? Do I need a
>>> kernel module for the UDF file system? Some other packages?
>>
>> I think the problem could be at DVD media detection, it seems not to be
>> recognized by the system.
>>
>> Greetings,
>>
>> --
>> Camaleón
>
> OK. I went at it systematically, with a root shell on the side to
> monitor what was going on.
>
> It appears to be a permissions problem. I may have to get around it as
> root, but I'd like to have some idea what's going on first.
>
> Here's what happened, starting from before I plugged in the USB DVD
> drive:
>
Initially:
hendrik@notlookedfor:~$ su
Password:
notlookedfor:/home/hendrik# ls /dev
agpgart loop1 sda2 tty2 tty45 uinput
autofs loop2 sda3 tty20 tty46 urandom
block loop3 sda4 tty21 tty47 usb
bsg loop4 sda5 tty22 tty48 v4l
btrfs-control loop5 sda6 tty23 tty49 vcs
bus loop6 sda7 tty24 tty5 vcs1
char loop7 sda8 tty25 tty50 vcs2
console MAKEDEV sg0 tty26 tty51 vcs3
core mapper shm tty27 tty52 vcs4
cpu mcelog snapshot tty28 tty53 vcs5
cpu_dma_latency media0 snd tty29 tty54 vcs6
disk mem sndstat tty3 tty55 vcs7
dm-0 net stderr tty30 tty56 vcsa
dm-1 network_latency stdin tty31 tty57 vcsa1
dm-2 network_throughput stdout tty32 tty58 vcsa2
dri null tty tty33 tty59 vcsa3
fb0 port tty0 tty34 tty6 vcsa4
fd ppp tty1 tty35 tty60 vcsa5
full psaux tty10 tty36 tty61 vcsa6
fuse ptmx tty11 tty37 tty62 vcsa7
hidraw0 pts tty12 tty38 tty63 VG1
hidraw1 random tty13 tty39 tty7 vga_arbiter
hpet rfkill tty14 tty4 tty8 video0
initctl root tty15 tty40 tty9 xconsole
input rtc tty16 tty41 ttyS0 zero
kmsg rtc0 tty17 tty42 ttyS1
log sda tty18 tty43 ttyS2
loop0 sda1 tty19 tty44 ttyS3
notlookedfor:/home/hendrik#
Next plug in USB DVD player. Then look at syslog and ls again:
notlookedfor:/home/hendrik# tail /var/log/syslog
Oct 28 12:44:32 notlookedfor kernel: [75156.024851] USB Mass Storage support
registered.
Oct 28 12:44:33 notlookedfor kernel: [75157.039253] scsi 2:0:0:0: CD-ROM
HL-DT-ST DVDRAM GP08NU20 1.00 PQ: 0 ANSI: 0
Oct 28 12:44:33 notlookedfor kernel: [75157.044786] scsi 2:0:0:0: Attached scsi
generic sg1 type 5
Oct 28 12:44:33 notlookedfor kernel: [75157.336214] sr0: scsi3-mmc drive:
24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 28 12:44:33 notlookedfor kernel: [75157.336227] cdrom: Uniform CD-ROM
driver Revision: 3.20
Oct 28 12:44:33 notlookedfor kernel: [75157.336720] sr 2:0:0:0: Attached scsi
CD-ROM sr0
Oct 28 12:45:10 notlookedfor acpid: client 2138[0:0] has disconnected
Oct 28 12:45:13 notlookedfor acpid: client connected from 2138[0:0]
Oct 28 12:45:13 notlookedfor acpid: 1 client rule loaded
Oct 28 12:45:14 notlookedfor kernel: [75197.760323] composite sync not supported
notlookedfor:/home/hendrik# ls /dev
agpgart hpet rtc tty15 tty42 ttyS3
autofs initctl rtc0 tty16 tty43 uinput
block input scd0 tty17 tty44 urandom
bsg kmsg sda tty18 tty45 usb
btrfs-control log sda1 tty19 tty46 v4l
bus loop0 sda2 tty2 tty47 vcs
cdrom loop1 sda3 tty20 tty48 vcs1
cdrom1 loop2 sda4 tty21 tty49 vcs2
cdrw loop3 sda5 tty22 tty5 vcs3
cdrw1 loop4 sda6 tty23 tty50 vcs4
char loop5 sda7 tty24 tty51 vcs5
console loop6 sda8 tty25 tty52 vcs6
core loop7 sg0 tty26 tty53 vcs7
cpu MAKEDEV sg1 tty27 tty54 vcsa
cpu_dma_latency mapper shm tty28 tty55 vcsa1
disk mcelog snapshot tty29 tty56 vcsa2
dm-0 media0 snd tty3 tty57 vcsa3
dm-1 mem sndstat tty30 tty58 vcsa4
dm-2 net sr0 tty31 tty59 vcsa5
dri network_latency stderr tty32 tty6 vcsa6
dvd network_throughput stdin tty33 tty60 vcsa7
dvd1 null stdout tty34 tty61 VG1
dvdrw port tty tty35 tty62 vga_arbiter
dvdrw1 ppp tty0 tty36 tty63 video0
fb0 psaux tty1 tty37 tty7 xconsole
fd ptmx tty10 tty38 tty8 zero
full pts tty11 tty39 tty9
fuse random tty12 tty4 ttyS0
hidraw0 rfkill tty13 tty40 ttyS1
hidraw1 root tty14 tty41 ttyS2
notlookedfor:/home/hendrik#
Now /dev/sro exists. as well as /dev/cdrom. /dev/cdrom1, /dev/dvd. /dev/dvd1/
/dev/dvdrw. and /dev/dvdrw1/
More specifcally,
notlookedfor:/home/hendrik# ls -l /dev/sr0 /dev/cdr* /dev/dvd*
lrwxrwxrwx 1 root root 3 Oct 28 12:44 /dev/cdrom -> sr0
lrwxrwxrwx 1 root root 3 Oct 28 12:44 /dev/cdrom1 -> sr0
lrwxrwxrwx 1 root root 3 Oct 28 12:44 /dev/cdrw -> sr0
lrwxrwxrwx 1 root root 3 Oct 28 12:44 /dev/cdrw1 -> sr0
lrwxrwxrwx 1 root root 3 Oct 28 12:44 /dev/dvd -> sr0
lrwxrwxrwx 1 root root 3 Oct 28 12:44 /dev/dvd1 -> sr0
lrwxrwxrwx 1 root root 3 Oct 28 12:44 /dev/dvdrw -> sr0
lrwxrwxrwx 1 root root 3 Oct 28 12:44 /dev/dvdrw1 -> sr0
brw-rw----+ 1 root cdrom 11, 0 Oct 28 12:44 /dev/sr0
notlookedfor:/home/hendrik#
so /dev/sr0 has restricted permissions, just rw for root and for the cdrom
group.
notlookedfor:/home/hendrik# cat /etc/group | grep cdrom
cdrom:x:24:dummy
notlookedfor:/home/hendrik#
But it's quite clear I'm not in the cdrom group. Would this explain why I'm
having trouble playing the DVD I recorded on my DVD recorder? Possibly.
Except that I have no trouble playing a commercial DVD, which I presume not
being in the cdrom group would also prevent. Nonetheless, I'll put myself into
the cdrom grop.
notlookedfor:/home/hendrik# adduser hendrik cdrom
Adding user `hendrik' to group `cdrom' ...
Adding user hendrik to group cdrom
Done.
notlookedfor:/home/hendrik#
Next, I'll try putting my DVD into the DVD player.
i'm told in a popup window,
Unablec to mount $ DVD Rewritable Volume $
Not Authorized
and invited to click "OK" in the message box. Now I don't particularly think
this is OK, but I click it anyway.
Back to my root login, I check out /mnt. It looks as if nothing particular is
moounted there,
notlookedfor:/home/hendrik# ls /mnt
notlookedfor:/home/hendrik# df /mnt
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VG1-testing--root 20642428 9825456 9768396 51% /
so, as root, I mount /dev/dvd
notlookedfor:/home/hendrik# mount /dev/dvd /mnt
and it appears to succeed. What's on that disk?
notlookedfor:/home/hendrik# ls /mnt
DVD_RTAV
notlookedfor:/home/hendrik# ls /mnt -l
total 2
d--------- 2 4294967295 4294967295 2048 Dec 31 2001 DVD_RTAV
notlookedfor:/home/hendrik# ls -l /mnt/DVD_RTAV/
total 3301444
-rw-rw-rw- 1 4294967295 4294967295 122880 Nov 28 2002 VR_MANGR.IFO
-rw-rw-rw- 1 4294967295 4294967295 3380555776 Nov 28 2002 VR_MOVIE.VRO
notlookedfor:/home/hendrik# ls -al /mnt/DVD_RTAV/
total 3301448
d--------- 2 4294967295 4294967295 2048 Dec 31 2001 .
drwxrwxrwx 3 4294967295 4294967295 2048 Oct 2 17:52 ..
-rw-rw-rw- 1 4294967295 4294967295 122880 Nov 28 2002 VR_MANGR.IFO
-rw-rw-rw- 1 4294967295 4294967295 3380555776 Nov 28 2002 VR_MOVIE.VRO
notlookedfor:/home/hendrik# file /mnt/DVD_RTAV/*
/mnt/DVD_RTAV/VR_MANGR.IFO: data
/mnt/DVD_RTAV/VR_MOVIE.VRO: MPEG sequence, v2, program multiplex
notlookedfor:/home/hendrik#
This is not what I was expecting, but I can't say I know what to expect.
Now let's try starting VLC, as ordinary user, I could start is from the gnome
menu, but I do it from the shell, in case there should be relevant messages:
It starts up.
hendrik@notlookedfor:~$ vlc
VLC media player 1.1.12 The Luggage (revision exported)
Blocked: call to unsetenv("DBUS_ACTIVATION_ADDRESS")
Blocked: call to unsetenv("DBUS_ACTIVATION_BUS_TYPE")
[0x877f8fc] main libvlc: Running vlc with the default interface. Use 'cvlc' to
use vlc without interface.
Blocked: call to setlocale(6, "")
Warning: call to srand(1319859644)
Warning: call to rand()
Blocked: call to setlocale(6, "")
(process:16422): Gtk-WARNING **: Locale not supported by C library.
Using the fallback 'C' locale.
edia->open disk
Open media dialogue shows up, with DVD checked, disk device /dev/dvd ,starting
posision litle 0, chapter 0, audio track -1, subtitles track -1
And the shell window now says,
(process:16422): Gtk-WARNING **: Locale not supported by C library.
Using the fallback 'C' locale.
Warning: call to rand()
Warning: call to rand()
Warning: call to rand()
Warning: call to rand()
I say "play".
shell window gets
libdvdnav: Using dvdnav version 4.1.4
libdvdread: Using libdvdcss version 1.2.10 for DVD access
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
libdvdread: Can't open file VIDEO_TS.IFO.
libdvdnav: vm: failed to read VIDEO_TS.IFO
libdvdread: Using libdvdcss version 1.2.10 for DVD access
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
libdvdread: Can't open file VIDEO_TS.BU.
[0xb4c00624] main input error: open of `dvd:///dev/dvd' failed: (null)
and an error window pops up saying
Your input can't be opened:
VLC is unable to open the MRL 'dvd:///dev/dvd'. Check the log for details.
But it doesn't have a menu item to show a log. Presumably that's why I needed
to start it from the shell.
What's my next step? Presumably it's a permissions problem. What is the
meaning of user ID and group ID 4294967295 anyway? Should I copy the
VR_MANGR.IFO and VR_MOVIE.VRO files as root and change their permissinos?
Should I run vlc as root? Should I try to chmod the files on the DVD itself?
Would that even work?
-- hendrik
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