Jason Curl, in order to allow additional upstream developers to examine the
issue, at your earliest convenience, could you please test the latest upstream
kernel available from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D ?
Please keep in mind the following:
1) The one to test is at the very top line at the top of the page (not the
daily folder).
2) The release names are irrelevant.
3) The folder time stamps aren't indicative of when the kernel actually was
released upstream.
4) Install instructions are available at
https://wiki.ubuntu.com/Kernel/MainlineBuilds .
If testing on your main install would be inconvenient, one may:
1) Install Ubuntu to a different partition and then test this there.
2) Backup, or clone the primary install.
If the latest kernel did not allow you to test to the issue (ex. you couldn't
boot into the OS) please make a comment in your report about this, and continue
to test the next most recent kernel version until you can test to the issue.
Once you've tested the upstream kernel, please comment on which kernel version
specifically you tested. If this issue is fixed in the mainline kernel, please
add the following tags by clicking on the yellow circle with a black pencil
icon, next to the word Tags, located at the bottom of the report description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ
Where X, and Y are the first two numbers of the kernel version, and Z is
the release candidate number if it exists.
If the mainline kernel does not fix the issue, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ
Please note, an error to install the kernel does not fit the criteria of
kernel-bug-exists-upstream.
Also, you don't need to apport-collect further unless specifically
requested to do so.
Once testing of the latest upstream kernel is complete, please mark this
report Status Confirmed. Please let us know your results.
Thank you for your understanding.
** Tags removed: bios-outdated-2.30
** Tags added: latest-bios-2.30
** Changed in: linux (Ubuntu)
Importance: Low => Medium
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1542862
Title:
pl2303h and ftdi serial port bug
Status in linux package in Ubuntu:
Incomplete
Bug description:
When developing an application using serial ports, behaviour between
process restarts is undefined for particular usb serial port chipsets.
Tested chipsets to fail are:
* pl2303H
* ftdi
Tested chipsets to work are:
* 16550A
* pl2303ra
Attached is a minimal test program to recreate the issue. The program
needs to run twice, the first to create the problem, the second
instance that shows the problem. See the comments at the beginning of
the test program to see expected output and observed output.
You'll need the device under question attached and running as the
receiver in the test program and a NULL modem cable (3 wire). Easiest
to show the problem if you have two of the same USB devices attached
and execute the command with "./a.out /dev/ttyUSB0 /dev/ttyUSB1".
Note, flushing, and other workarounds haven't worked, only physically
removing and reinserting the problematic devices between runs (in
particular, the device that is receiving the data over the serial
port).
As there appears to be data in a buffer between runs that can't be
properly flushed, I can't say if this is a potential security issue or
not.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.19.0-49-generic 3.19.0-49.55~14.04.1
ProcVersionSignature: Ubuntu 3.19.0-49.55~14.04.1-generic 3.19.8-ckt12
Uname: Linux 3.19.0-49-generic i686
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: i386
CurrentDesktop: Unity
Date: Sun Feb 7 15:28:42 2016
InstallationDate: Installed on 2016-02-04 (2 days ago)
InstallationMedia:
SourcePackage: linux-lts-vivid
UpgradeStatus: No upgrade log present (probably fresh install)
---
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: jcurl 2149 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=f20d2ed2-18be-4b14-b4f2-d28d8962a377
InstallationDate: Installed on 2016-02-04 (31 days ago)
InstallationMedia:
MachineType: LENOVO 64577WG
NonfreeKernelModules: nvidia
Package: linux (not installed)
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
3.3V
32-bit
PC Card
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-49-generic
root=UUID=77ac576d-595e-4ec1-ae5e-3791f7cfe23b ro quiet splash
ProcVersionSignature: Ubuntu 3.19.0-49.55~14.04.1-generic 3.19.8-ckt12
RelatedPackageVersions:
linux-restricted-modules-3.19.0-49-generic N/A
linux-backports-modules-3.19.0-49-generic N/A
linux-firmware 1.127.20
Tags: trusty
Uname: Linux 3.19.0-49-generic i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 04/08/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 7LETC7WW (2.27 )
dmi.board.name: 64577WG
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr7LETC7WW(2.27):bd04/08/2010:svnLENOVO:pn64577WG:pvrThinkPadT61p:rvnLENOVO:rn64577WG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 64577WG
dmi.product.version: ThinkPad T61p
dmi.sys.vendor: LENOVO
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