This is probably the thread the controlling process thinks is hung.

Thread 3 (Thread 0x7f82b7d36980 (LWP 4925)):
#0  0x00007f82badb6c67 in ioctl () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007f82b55c62b8 in drmIoctl () from
/usr/lib/x86_64-linux-gnu/libdrm.so.2
No symbol table info available.
#2  0x00007f82b4b1049f in drm_intel_gem_bo_start_gtt_access () from
/usr/lib/x86_64-linux-gnu/libdrm_intel.so.1
No symbol table info available.
#3  0x00007f82b531164a in ?? () from
/usr/lib/x86_64-linux-gnu/dri/i965_dri.so
No symbol table info available.
#4  0x00007f82b5312671 in ?? () from
/usr/lib/x86_64-linux-gnu/dri/i965_dri.so
No symbol table info available.
#5  0x00007f82b5399baf in ?? () from
/usr/lib/x86_64-linux-gnu/dri/i965_dri.so
No symbol table info available.
#6  0x00007f82b6259d7f in ?? () from
/usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
No symbol table info available.
#7  0x00007f82b6231563 in glXMakeCurrentReadSGI () from
/usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
No symbol table info available.
#8  0x00007f82c4a13894 in ?? () from
/usr/lib/chromium-browser/libs/libgl_wrapper.so
No symbol table info available.
#9  0x00007f82c6b5d4e7 in ?? () from
/usr/lib/chromium-browser/libs/libgpu.so
No symbol table info available.
#10 0x00007f82c6271503 in ?? () from
/usr/lib/chromium-browser/libs/libcontent.so



On Tue, Dec 17, 2013 at 1:57 PM, Chad Miller <email address hidden>wrote:

> The zeros was definitely a fluke. The disk operations of adding to the
> file and updating the size was interrupted in the middle somewhere.
>
>
>
>
> On Tue, Dec 17, 2013 at 1:37 PM, James Mazur <email address hidden>wrote:
>
>> I'm not having any problems with printing.
>>
>> I ran the bug again and this time the log came up without the zeroes in
>> it.  So that might have been a fluke, because my system locked up
>> completely as normally (no response to any keyboard / touchpad action,
>> at all).  There were also no lines from the past 10 minutes before the
>> crash, which would have included when I first started Chromium and when
>> I first visited the Google Maps page.
>>
>> I also played music in the background to see what would happen...it
>> turned out that the same half-second of the song kept being repeated
>> over and over again...it sounded like a broken record, or a skip in a
>> CD.  Maybe the fact that the music didn't just stop gives a clue?
>>
>> Finally, I figured out what in particular seems to cause the lockup.  It
>> is not just visiting Google Maps, or even just panning and zooming after
>> doing a search.  It's, weird as it sounds, zooming out after having been
>> zoomed in very close.
>>
>> --
>> You received this bug notification because you are a bug assignee.
>> https://bugs.launchpad.net/bugs/1250174
>>
>> Title:
>>   chromium-browser crashed with SIGSEGV in
>>   content::GpuWatchdogThread::DeliberatelyTerminateToRecoverFromHang()
>>
>> Status in Chromium Browser:
>>   Unknown
>> Status in “chromium-browser” package in Ubuntu:
>>   Incomplete
>>
>> Bug description:
>>   I was using Google Maps and Chromium froze up and crashed.  After
>>   this, rendering of the new Google Maps page causes jagged lines to
>>   appear in the browser page display section, until I reboot the
>>   computer.  Killing and relaunching Chromium doesn't fix the problem.
>>   The jagged lines still appear after computer reboot if I visit Google
>>   Maps again, and again won't disappear until I restart the computer.
>>
>>   ProblemType: Crash
>>   DistroRelease: Ubuntu 12.04
>>   Package: chromium-browser 30.0.1599.114-0ubuntu0.12.04.3
>>   ProcVersionSignature: Ubuntu 3.8.0-33.48~precise1-generic 3.8.13.11
>>   Uname: Linux 3.8.0-33-generic x86_64
>>   ApportVersion: 2.0.1-0ubuntu17.6
>>   Architecture: amd64
>>   ChromiumPrefs: can't open profile
>> /home/jamesmaz/.config/chromium/Default/Preferences
>>   Date: Mon Nov 11 13:10:09 2013
>>   Desktop-Session:
>>    DESKTOP_SESSION = ubuntu
>>    XDG_CONFIG_DIRS = /etc/xdg/xdg-ubuntu:/etc/xdg
>>    XDG_DATA_DIRS =
>> /usr/share/ubuntu:/usr/share/gnome:/usr/local/share/:/usr/share/
>>   Env:
>>    MOZ_PLUGIN_PATH = None
>>    LD_LIBRARY_PATH = None
>>   ExecutablePath: /usr/lib/chromium-browser/chromium-browser
>>   InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release
>> amd64 (20130820.1)
>>   MarkForUpload: True
>>   ProcCmdline: /usr/lib/chromium-browser/chromium-browser\
>> --type=gpu-process\ --channel=4656.10.459810737\
>> --supports-dual-gpus=false\ --gpu-driver-bug-workarounds=0,6,18\
>> --gpu-vendor-id=0x8086\ --gpu-device-id=0x0106\ --gpu-driver-vendor=Mesa\
>> --gpu-driver-version=9.1.7
>>   ProcEnviron:
>>
>>   SegvAnalysis:
>>    Segfault happened at: 0x7f82c62ad43e:        movl   $0x1337,0x0
>>    PC (0x7f82c62ad43e) ok
>>    source "$0x1337" ok
>>    destination "0x0" (0x00000000) not located in a known VMA region
>> (needed writable region)!
>>    Stack memory exhausted (SP below stack segment)
>>   SegvReason: writing NULL VMA
>>   Signal: 11
>>   SourcePackage: chromium-browser
>>   StacktraceTop:
>>    ?? () from /usr/lib/chromium-browser/libs/libcontent.so
>>    base::MessageLoop::RunTask(base::PendingTask const&) () from
>> /usr/lib/chromium-browser/libs/libbase.so
>>    base::MessageLoop::DeferOrRunPendingTask(base::PendingTask const&) ()
>> from /usr/lib/chromium-browser/libs/libbase.so
>>    base::MessageLoop::DoDelayedWork(base::TimeTicks*) () from
>> /usr/lib/chromium-browser/libs/libbase.so
>>    ?? () from /usr/lib/chromium-browser/libs/libbase.so
>>   Title: chromium-browser crashed with SIGSEGV in
>> base::MessageLoop::RunTask()
>>   UpgradeStatus: No upgrade log present (probably fresh install)
>>   UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
>>   chromium-default:
>>    CHROMIUM_FLAGS=""
>>    . /usr/lib/pepflashplugin-installer/pepflashplayer.sh
>>   mtime.conffile..etc.chromium.browser.default: 2013-11-10T15:09:15.272458
>>
>> To manage notifications about this bug go to:
>> https://bugs.launchpad.net/chromium-browser/+bug/1250174/+subscriptions
>>
>
>