Ah, thanks for pointing out the BIOS update. However it didn't change
anything related to the issue.
$ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
8DET70WW (1.40 )
05/14/2015
The flickering is also present for me in the latest mainline
$uname -a
Linux river
Maybe a duplicate of https://bugs.launchpad.net/ubuntu/+source/xserver-
xorg-video-intel/+bug/1522922 ... weird that it only occurs in the
latest kernel package
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With the previous kernel I don't see the glitches nor the i915 underruns
$ uname -a
Linux river 4.2.0-27-generic #32-Ubuntu SMP Fri Jan 22 04:49:08 UTC 2016 x86_64
x86_64 x86_64 GNU/Linux
$ dmesg | grep i915
[2.698444] [drm] Initialized i915 1.6.0 20150522 for :00:02.0 on minor 0
[
See recording on http://tinypic.com/r/2wpt74m/9 (glitches where not
visible on a direct screen grab)
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https://bugs.launchpad.net/bugs/1550779
Title:
[i915]]
Maybe related to https://bugs.launchpad.net/bugs/1451632
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https://bugs.launchpad.net/bugs/1550779
Title:
[i915]] *ERROR* CPU pipe A FIFO underrunXorg glitches
Public bug reported:
Upgraded linux-image-extra-4.2.0-30-generic I see graphic glitches,
looks like the graphic buffer gets screwed up
- funny repetition's patterns (back in time glitches)
- black screen (<1sec)
- graphic errors
I can influence the severity of the issue with switching
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