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[JVD <1409393@xxxxxxxxxxxxxxxxxx>]

That last comment was from last week - I still had it in my firefox
"Restore Session" and had not pressed "Post Comment" yet.

But it just happened again today  - it looks like the frequency of this bug is increasing with newer kernel, xorg-server, and 
xorg-drivers-radeon releases .

Here is the info from today's lockup :

(gdb) where
#0  0x00007f8c7e248337 in ioctl () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f8c7f52f3a4 in drmIoctl () from /usr/lib/x86_64-linux-gnu/libdrm.so.2
#2  0x00007f8c7f5316bf in drmCommandWriteRead () from /usr/lib/x86_64-linux-gnu/libdrm.so.2
#3  0x00007f8c7a093c83 in ?? () from /usr/lib/x86_64-linux-gnu/libdrm_radeon.so.1
#4  0x00007f8c7a2d52d9 in ?? () from /usr/lib/xorg/modules/drivers/radeon_drv.so
#5  0x00007f8c79c46856 in ?? () from /usr/lib/xorg/modules/libexa.so
#6  0x00007f8c79c46c9b in ?? () from /usr/lib/xorg/modules/libexa.so
#7  0x00007f8c807c4c2d in miCopyRegion ()
#8  0x00007f8c807c51b6 in miDoCopy ()
#9  0x00007f8c79c45326 in ?? () from /usr/lib/xorg/modules/libexa.so
#10 0x00007f8c80771b38 in ?? ()
#11 0x00007f8c8068d3d1 in ?? ()
#12 0x00007f8c80690f0e in ?? ()
#13 0x00007f8c80694d9a in ?? ()
#14 0x00007f8c7e178ec5 in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#15 0x00007f8c806801ee in _start ()
(gdb) info regs
Undefined info command: "regs".  Try "help info".
(gdb) info reg
rax            0xfffffffffffffe00       -512
rbx            0xffffffff       4294967295
rcx            0xffffffffffffffff       -1
rdx            0x7fffa4188270   140735946457712
rsi            0xc020645d       3223348317
rdi            0xc      12
rbp            0x7fffa4188270   0x7fffa4188270
rsp            0x7fffa4188218   0x7fffa4188218
r8             0x7f8c85add9c0   140241514912192
r9             0x0      0
r10            0x7fffa4188330   140735946457904
r11            0x246    582
r12            0xc020645d       3223348317
r13            0xc      12
r14            0x753000 7680000
r15            0x4      4
rip            0x7f8c7e248337   0x7f8c7e248337 <ioctl+7>
eflags         0x246    [ PF ZF IF ]
cs             0x33     51
ss             0x2b     43
ds             0x0      0
es             0x0      0
fs             0x0      0
gs             0x0      0


This time I did not see the 'GPU lockup CP stall' messages in the dmesg output -
it looks like the newer Xorg server & radeon_drv are capable of locking up
all on their own without a GPU lockup .

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https://bugs.launchpad.net/bugs/1409393

Title:
  radeon GPU lockup CP stall

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 14.04.1 LTS

  I was working on a project and had the following applications open

  MySQL Workbench
  Google Chrome
  gnome-screenshot

  All of a sudden everything freezes, the indicator-multiload stopped moving.
  I was able to switch to tty1 using CTRL+ALT+F1 (see foto of the screen in the attachments)

  The error reads:
  radeon 0000:01:00.0: GPU lockup CP stall for more than 84744msec
  drm:radeon_cs_ib_fill *ERROR* Failed to get ip !
  drm:r600_dma_ring_test *ERROR* radeon: ring 3 test failed (0xCAFEDEAD)
  drm:r600_resume *ERROR* r600 startup failed on resume

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-43-generic 3.13.0-43.72
  ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
  Uname: Linux 3.13.0-43-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  kat        3551 F.... pulseaudio
   /dev/snd/controlC0:  kat        3551 F.... pulseaudio
  Date: Sun Jan 11 05:33:50 2015
  InstallationDate: Installed on 2014-03-28 (288 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140322)
  MachineType: Sony Corporation VGN-FW31ZJ
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=nl_NL.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.13.0-43-generic root=UUID=6bc3bac2-11d6-4d1a-8d93-7c9b6894ea5e ro rootflags=subvol=@ quiet splash radeon.dpm=1 vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-43-generic N/A
   linux-backports-modules-3.13.0-43-generic  N/A
   linux-firmware                             1.127.11
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/27/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: R2060Y0
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrR2060Y0:bd08/27/2009:svnSonyCorporation:pnVGN-FW31ZJ:pvrC6015XL3:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: VGN-FW31ZJ
  dmi.product.version: C6015XL3
  dmi.sys.vendor: Sony Corporation

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