[Bug 95010] Screen Flickering on Intel Card

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95010

--- Comment #2 from Arthur <silpertan at gmail.com> ---
Confirming that this affects multiple users:

I also have a Dell XPS 13 (9350 model with Skylake). I previously upgraded to a
4.5 kernel from the arch linux testing repo and noticed the same flickering
mentioned by Carlo. I then downgraded back to 4.4.5 and the flickering went
away. Now that 4.5 is out of testing, I pulled it down in my latest update, and
the flickering has returned.

I do see the same message that Carlo mentions in dmesg output. It is the very
last message in my output (see below with a little more context). It seems to
be pretty consistent around that time at bootup regardless of how long I wait
to login (but I have no idea if it's relevant - just confirming that I also see
the message).

[    3.393442] IPv6: ADDRCONF(NETDEV_UP): wlp58s0: link is not ready
[    3.433790] IPv6: ADDRCONF(NETDEV_UP): wlp58s0: link is not ready
[    3.557638] IPv6: ADDRCONF(NETDEV_UP): wlp58s0: link is not ready
[   13.702477] IPv6: ADDRCONF(NETDEV_CHANGE): wlp58s0: link becomes ready
[   22.293947] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe A FIFO underrun

Lastly, booting with the "i915.enable_rc6=0" option does make the flickering
stop.

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