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[Bug 1456596] Re: DELL XPS 13 (9343) Strange, seemingly perpetual repeat of drm activity


ullix, the next step is to fully reverse commit bisect from kernel 3.19
to 4.1-rc4 in order to identify the last bad commit, followed
immediately by the first good one. Once this commit has been identified,
then it may be reviewed as a candidate for backporting into your
release. Could you please do this following

Please note, finding adjacent kernel versions is not fully commit

Also, you would have to uninstall the bcmwl module for the duration of
the bisect so proprietary module errors are avoided.

Thank you for your understanding.

Helpful bug reporting tips:

** Tags added: kernel-fixed-upstream-4.1-rc4 latest-bios-a03 needs-

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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  DELL XPS 13 (9343) Strange, seemingly perpetual repeat of drm activity

Status in linux package in Ubuntu:

Bug description:
  This laptop came factory preinstalled with Ubuntu, but due to problems
  had been modified. Most recent apport info from a few minutes ago is
  here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1456585

  dmesg output is added. There is about once every second this activity:

  [  217.650626] [drm:intel_display_power_put] disabling display
  [  217.650632] [drm:hsw_set_power_well] Requesting to disable the power well
  [  217.682626] [drm:intel_display_power_get] enabling display
  [  217.682631] [drm:hsw_set_power_well] Enabling power well

  dmesg output after cold boot, login to the desktop, starting the
  terminal, and leaving it for a few minutes is attached.

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