I opened a bug ticket with the intel driver kernel developers:
https://bugs.freedesktop.org/show_bug.cgi?id=81537
** Bug watch added: freedesktop.org Bugzilla #81537
https://bugs.freedesktop.org/show_bug.cgi?id=81537
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I reverted the offending commit in the v3.16-rc5 branch and it seems to
fix the problem.
Specifically, in the file drivers/gpu/drm/i915/intel_dp.c
near line 1902, under function :
static void intel_disable_dp(struct intel_encoder *encoder)
I changed line 1912 from:
intel_dp_sink_
I completed the bisect, here is the result:
$ git bisect bad fdbc3b1f639bb2cbfb32c612b2699e0ba373317d
fdbc3b1f639bb2cbfb32c612b2699e0ba373317d is the first bad commit
$ git show
commit fdbc3b1f639bb2cbfb32c612b2699e0ba373317d
Author: Jani Nikula
Date: Tue Nov 12 17:10:13 2013 +0200
drm/
apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155031/+files/Lspci.txt
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** Attachment added: "IwConfig.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155030/+files/IwConfig.txt
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** Attachment added: "CRDA.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155028/+files/CRDA.txt
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Ti
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** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155038/+files/UdevDb.txt
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** Attachment added: "UdevLog.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155039/+files/UdevLog.txt
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** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155036/+files/ProcModules.txt
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** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155032/+files/Lsusb.txt
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** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155040/+files/WifiSyslog.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155029/+files/CurrentDmesg.txt
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** Attachment added: "ProcEnviron.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155034/+files/ProcEnviron.txt
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** Attachment added: "PulseList.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155037/+files/PulseList.txt
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** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155033/+files/ProcCpuinfo.txt
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** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155035/+files/ProcInterrupts.txt
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apport information
** Tags added: apport-collected trusty
** Description changed:
I recently upgraded from 12.04 to 14.04. Since the upgrade I have been
having issues with X freezing after the screen enters power saving. The
issue did not occur in 12.04. If I boot up a raring or saucy k
apport information
** Attachment added: "BootDmesg.txt"
https://bugs.launchpad.net/bugs/1343543/+attachment/4155027/+files/BootDmesg.txt
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** Attachment added: "Xorg.0.log after freeze"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1343543/+attachment/4154967/+files/Xorg.0.log_post-freeze.txt
** Tags added: kernel-bug
** Tags added: drm-intel xorg
** Description changed:
- I recently upgraded from 12.04 to 14.04. Since
Public bug reported:
I recently upgraded from 12.04 to 14.04. Since the upgrade I have been
having issues with X freezing after the screen enters power saving. The
issue did not occur in 12.04. If I boot up a raring or saucy kernel,
the issue does not occur. The 3.13 trusty, and 3.16 utopic ke
** Attachment added: "dmesg after freeze"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1343543/+attachment/4154952/+files/dmesg_post-freeze.txt
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