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[kay <1548052@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Two monitors KDE env (laptop LCD + external moinitor). Installed new
wily LTS kernel with the video driver:

sudo apt-get install --install-recommends linux-generic-lts-wily
xserver-xorg-core-lts-wily xserver-xorg-lts-wily xserver-xorg-video-all-
lts-wily xserver-xorg-input-all-lts-wily libwayland-egl1-mesa-lts-wily
libgl1-mesa-glx-lts-wily libgl1-mesa-glx-lts-wily:i386 libglapi-mesa-
lts-wily:i386

After 4 hours of working in Chromium (with --disable-gpu flag) I got
segmentation fault:

[ 11249.976] (EE)
[ 11249.976] (EE) Backtrace:
[ 11249.977] (EE) 0: /usr/bin/X (xorg_backtrace+0x48) [0x5611c75a5308]
[ 11249.977] (EE) 1: /usr/bin/X (0x5611c7404000+0x1a5359) [0x5611c75a9359]
[ 11249.977] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7fda90346000+0x36d40) [0x7fda9037cd40]
[ 11249.977] (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fda8c136000+0x259dc) [0x7fda8c15b9dc]
[ 11249.977] (EE) 4: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fda8c136000+0x26b3f) [0x7fda8c15cb3f]
[ 11249.977] (EE) 5: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fda8c136000+0x4a2a8) [0x7fda8c1802a8]
[ 11249.977] (EE) 6: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fda8c136000+0x4a874) [0x7fda8c180874]
[ 11249.977] (EE) 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fda8c136000+0x591d6) [0x7fda8c18f1d6]
[ 11249.977] (EE) 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fda8c136000+0x59649) [0x7fda8c18f649]
[ 11249.977] (EE) 9: /usr/bin/X (0x5611c7404000+0x13021d) [0x5611c753421d]
[ 11249.978] (EE) 10: /usr/bin/X (0x5611c7404000+0x51205) [0x5611c7455205]
[ 11249.978] (EE) 11: /usr/bin/X (0x5611c7404000+0x5433e) [0x5611c745833e]
[ 11249.978] (EE) 12: /usr/bin/X (0x5611c7404000+0x5818b) [0x5611c745c18b]
[ 11249.978] (EE) 13: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7fda90367ec5]
[ 11249.978] (EE) 14: /usr/bin/X (0x5611c7404000+0x4370e) [0x5611c744770e]
[ 11249.978] (EE)
[ 11249.978] (EE) Segmentation fault at address 0x7fd8e21dbde0
[ 11249.978] (EE)
Fatal server error:
[ 11249.978] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 11249.978] (EE)
[ 11249.978] (EE)

Full log attached.

kernel cmdline:
cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-4.2.0-27-generic root=/dev/mapper/VG-root ro quiet splash tpm_tis.interrupts=0 video=efifb vt.handoff=7

cat /proc/version_signature
Ubuntu 4.2.0-27.32~14.04.1-generic 4.2.8-ckt1

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: fault kernel lts segfautl segmentation wily xorg

** Attachment added: "xorg log"
   https://bugs.launchpad.net/bugs/1548052/+attachment/4577189/+files/xorg.log

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https://bugs.launchpad.net/bugs/1548052

Title:
  New Ubuntu 14.04.4 LTS intel video driver Xorg segmentation fault

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Two monitors KDE env (laptop LCD + external moinitor). Installed new
  wily LTS kernel with the video driver:

  sudo apt-get install --install-recommends linux-generic-lts-wily
  xserver-xorg-core-lts-wily xserver-xorg-lts-wily xserver-xorg-video-
  all-lts-wily xserver-xorg-input-all-lts-wily libwayland-egl1-mesa-lts-
  wily libgl1-mesa-glx-lts-wily libgl1-mesa-glx-lts-wily:i386 libglapi-
  mesa-lts-wily:i386

  After 4 hours of working in Chromium (with --disable-gpu flag) I got
  segmentation fault:

  [ 11249.976] (EE)
  [ 11249.976] (EE) Backtrace:
  [ 11249.977] (EE) 0: /usr/bin/X (xorg_backtrace+0x48) [0x5611c75a5308]
  [ 11249.977] (EE) 1: /usr/bin/X (0x5611c7404000+0x1a5359) [0x5611c75a9359]
  [ 11249.977] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7fda90346000+0x36d40) [0x7fda9037cd40]
  [ 11249.977] (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fda8c136000+0x259dc) [0x7fda8c15b9dc]
  [ 11249.977] (EE) 4: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fda8c136000+0x26b3f) [0x7fda8c15cb3f]
  [ 11249.977] (EE) 5: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fda8c136000+0x4a2a8) [0x7fda8c1802a8]
  [ 11249.977] (EE) 6: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fda8c136000+0x4a874) [0x7fda8c180874]
  [ 11249.977] (EE) 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fda8c136000+0x591d6) [0x7fda8c18f1d6]
  [ 11249.977] (EE) 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fda8c136000+0x59649) [0x7fda8c18f649]
  [ 11249.977] (EE) 9: /usr/bin/X (0x5611c7404000+0x13021d) [0x5611c753421d]
  [ 11249.978] (EE) 10: /usr/bin/X (0x5611c7404000+0x51205) [0x5611c7455205]
  [ 11249.978] (EE) 11: /usr/bin/X (0x5611c7404000+0x5433e) [0x5611c745833e]
  [ 11249.978] (EE) 12: /usr/bin/X (0x5611c7404000+0x5818b) [0x5611c745c18b]
  [ 11249.978] (EE) 13: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7fda90367ec5]
  [ 11249.978] (EE) 14: /usr/bin/X (0x5611c7404000+0x4370e) [0x5611c744770e]
  [ 11249.978] (EE)
  [ 11249.978] (EE) Segmentation fault at address 0x7fd8e21dbde0
  [ 11249.978] (EE)
  Fatal server error:
  [ 11249.978] (EE) Caught signal 11 (Segmentation fault). Server aborting
  [ 11249.978] (EE)
  [ 11249.978] (EE)

  Full log attached.

  kernel cmdline:
  cat /proc/cmdline
  BOOT_IMAGE=/vmlinuz-4.2.0-27-generic root=/dev/mapper/VG-root ro quiet splash tpm_tis.interrupts=0 video=efifb vt.handoff=7

  cat /proc/version_signature
  Ubuntu 4.2.0-27.32~14.04.1-generic 4.2.8-ckt1

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