* [BUG] Blinking display with 4.6-rc*
@ 2016-04-23 9:31 Steinar H. Gunderson
2016-04-25 8:23 ` Jani Nikula
0 siblings, 1 reply; 3+ messages in thread
From: Steinar H. Gunderson @ 2016-04-23 9:31 UTC (permalink / raw)
To: intel-gfx
Hi,
I have a Lenovo X240, which has Haswell integrated graphics. On upgrade from
4.5.0 to 4.6-rc1, I noticed an extremely irritating issue; about every
minute, the display shows black for a brief moment (perhaps one or two
frames), then reverts back to the correct display. There are no other ill
effects that I can see, in particular nothing in dmesg. I tried with 4.6-rc4,
and it has the same issue.
Do I need to run a full bisect to figure out what's causing this, or does it
ring a bell with someone?
/* Steinar */
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Homepage: https://www.sesse.net/
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [BUG] Blinking display with 4.6-rc*
2016-04-23 9:31 [BUG] Blinking display with 4.6-rc* Steinar H. Gunderson
@ 2016-04-25 8:23 ` Jani Nikula
2016-04-25 8:44 ` Steinar H. Gunderson
0 siblings, 1 reply; 3+ messages in thread
From: Jani Nikula @ 2016-04-25 8:23 UTC (permalink / raw)
To: Steinar H. Gunderson, intel-gfx
On Sat, 23 Apr 2016, "Steinar H. Gunderson" <steinar+dri@gunderson.no> wrote:
> I have a Lenovo X240, which has Haswell integrated graphics. On upgrade from
> 4.5.0 to 4.6-rc1, I noticed an extremely irritating issue; about every
> minute, the display shows black for a brief moment (perhaps one or two
> frames), then reverts back to the correct display. There are no other ill
> effects that I can see, in particular nothing in dmesg. I tried with 4.6-rc4,
> and it has the same issue.
>
> Do I need to run a full bisect to figure out what's causing this, or does it
> ring a bell with someone?
Please file a bug at [1]. Please add drm.debug=14 module parameter and
attach dmesg to the bug, all the way from boot to exhibiting the
problem.
You might also want to give drm-intel-nightly branch of [2] a try.
BR,
Jani.
[1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel
[2] http://cgit.freedesktop.org/drm-intel
--
Jani Nikula, Intel Open Source Technology Center
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2016-04-23 9:31 [BUG] Blinking display with 4.6-rc* Steinar H. Gunderson
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