Hubert Hesse, in order to allow additional upstream developers to examine the
issue, at your earliest convenience, could you please test the latest upstream
kernel available from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D ?
Please keep in mind the following:
1) The one to test is at
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
Hubert Hesse, thank you for reporting this and helping make Ubuntu
better.
As per http://support.lenovo.com/us/en/products/Laptops-and-
netbooks/ThinkPad-X-Series-
laptops/ThinkPad-X220?linkTrack=GPS:Body_Search%20Products=false an
update to your computer's buggy and outdated BIOS is available
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
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