[Lenovo ThinkPad T520] Casual screen freeze in Xubuntu 14.04

[Minium]

The screen casually freezes during normal operation. The problem can be temporarily bypassed by accessing the display manager (LightDM) over Ctrl+Alt+Del and logging back into the system.

WORKAROUND: Use nouveau.

WORKAROUND: Deactivating the touchpad functionality (setting it on mouse mode).

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-23-generic 3.13.0-23.45
ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
Uname: Linux 3.13.0-23-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: minium 2210 F.... pulseaudio
CurrentDesktop: XFCE
Date: Mon Apr 7 13:05:11 2014
HibernationDevice: RESUME=UUID=d5c0f9e8-e1a0-4ca1-a684-4879c98be5d5
InstallationDate: Installed on 2014-04-02 (4 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140402)
MachineType: LENOVO 4242PT2
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-23-generic.efi.signed root=/dev/mapper/xubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-23-generic N/A
 linux-backports-modules-3.13.0-23-generic N/A
 linux-firmware 1.127
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/26/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 8AET64WW (1.44 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4242PT2
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:bvr8AET64WW(1.44):bd07/26/2013:svnLENOVO:pn4242PT2:pvrThinkPadT520:rvnLENOVO:rn4242PT2:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4242PT2
dmi.product.version: ThinkPad T520
dmi.sys.vendor: LENOVO

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.14 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.14-trusty/

[Minium (minium)]

The bug persists with the newer kernel 3.14 RC 1.

[penalvch (penalvch)]

Krzysztof Okupski, could you please capture the xorg backtrace following https://help.ubuntu.com/community/DebuggingSystemCrash ?

[Minium (minium)]

Dear Mr. Penalver,
unfortunately I'm not capable of doing that.

I'm currently running the 3.14.2 kernel and the bug persists.
I believe that it comes from the nvidia driver. Whenever the
screen freezes and I have to log back in, I see the following
message in the Xorg logs:
=> NVIDIA(0): Setting mode "NULL"

I hope this helps in some way. The freezes appear relatively
often, that is up to once every few minutes.

[Minium (minium)]

I've reviewed the log and think it is possible that my bug is
related to
=> https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1220426

The touchpad appears to be "found" each time again and again
exactly when the crash occurs.

[Unterreiner Martin (martinunterreiner)]

Hey,

I had similar problems with random freezes after upgrade Xubuntu from 13.10 to 14.04. on my Desktop PC (Acer Aspire 3100).
Distro: Ubuntu 3.13.0-24.46-generic 3.13.9.

First I thought that the problem causes Xorg, but then I changed my driver from 331 to 304. With 319 there where the same problems.

Now I got no freezes anymore.

[Minium (minium)]

Dear Mr. Penvaler,

the bug is, at least in my case, definitely a duplicate of:
-> https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1220426

After following a temporary fix given there the freezes have stopped altogether.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Kevin Nadaud (kevin-nadaud)]

Hi,

I have the same freeze on a clevo W655 with a Intel graphic card (With Xubuntu 14.04). So I don't think that's only NVidia driver which cause the bug.

When the laptop freeze, i can stop the freeze by log out and log in with Ctrl+Alt+Del.

Regards

[penalvch (penalvch)]

Kevin Nadaud, thank you for your comment. So your hardware and problem may be tracked, could you please file a new report by executing the following in a terminal:
ubuntu-bug xorg

Please ensure you have xdiagnose installed, and that you click the Yes button for attaching additional debugging information.

For more on this, please see the official Ubuntu documentation:
Ubuntu X.Org Team, Ubuntu Bug Control, and Ubuntu Bug Squad: https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue
Ubuntu Community: https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette

When opening up the new report, please feel free to subscribe me to it.

Please note, not filing a new report will delay your problem being addressed as quickly as possible.

Thank you for your understanding.

[penalvch (penalvch)]

Minium, if you use nouveau instead of nvidia, is this problem still reproducible?

[Minium (minium)]

Nope, when running on noveau the error does not occur. However, as I noted before,
it appears to be some strange interaction between the touchpad and the nvidia driver.
After deactivating the touchpad functionality (setting it on mouse mode), the symptoms
disappear as well.

[penalvch (penalvch)]

Minium, would downgrading the nvidia driver provide a WORKAROUND following https://help.ubuntu.com/community/BinaryDriverHowto/Nvidia ?

[Peter Petrinec (petrinecp)]

Hi,
I'm also experiencing same freezes on my ASUS-U36SD with NVIDIA 331.38 driver. CTRL+ALT+DEL helps but it's quite annoying.

[penalvch (penalvch)]

Peter Petrinec, thank you for your comment. So your hardware and problem may be tracked, could you please file a new report by executing the following in a terminal:
ubuntu-bug xorg

Please ensure you have xdiagnose installed, and that you click the Yes button for attaching additional debugging information.

For more on this, please see the official Ubuntu documentation:
Ubuntu X.Org Team, Ubuntu Bug Control, and Ubuntu Bug Squad: https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue
Ubuntu Community: https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette

When opening up the new report, please feel free to subscribe me to it.

Please note, not filing a new report will delay your problem being addressed as quickly as possible.

Thank you for your understanding.

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]