I'm experiencing a similar problem after upgrade to Kubuntu Wily, though
in my case I have flickering when setting a lower resolution
(https://bugs.launchpad.net/ubuntu/+source/plasma-desktop/+bug/1514167).
The flickering makes the system quite unusable. I also tried to set the
UXA acceleration but that does not help (it actually makes things even
worse: slower and flickering does not go away).
The problem is with the current kernel
4.2.0-17-generic #21-Ubuntu SMP Fri Oct 23 19:56:16 UTC 2015 x86_64
x86_64 x86_64 GNU/Linux
Switching to the old kernel on boot SOLVES the problem of flickering and
things are usable again:
3.19.0-32-generic #37-Ubuntu SMP Wed Oct 21 10:23:06 UTC 2015 x86_64
x86_64 x86_64 GNU/Linux
This is my card:
sudo lshw -c video
*-display
description: VGA compatible controller
product: 4th Gen Core Processor Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 06
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:33 memory:f7400000-f77fffff memory:d0000000-dfffffff
ioport:f000(size=64)
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https://bugs.launchpad.net/bugs/1509556
Title:
Kubuntu Wily upgrade screen glitch with 4.2 kernel
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