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#1 2016-08-19 13:34:29

spidla
Member
Registered: 2016-08-19
Posts: 3

Intel driver & Skylake GPU

Hello everyone,
has anyone experience with Intel Skylake GPU on arch? When I let it autodetect settings without xorg.conf, Cinnamon crashes after login with libgdk exception.

I tried many combinations of:
1) DRI2/3 disabled,
2) different AccelMethods,
3) enabled TearFree,
4) kernel params (rc6, semaphores).

Only working solutions are:
1) disable DRI,
2) switch AccelMethod from SNA to UXA.

However both solutions have performance issues. So in the end I have bleeding edge GPU which does not work :-)

Any ideas?

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#2 2016-08-19 13:43:00

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 21,427

Re: Intel driver & Skylake GPU

There are some problems with xf86-video-intel, as it is badly maintained. People have reported good results switching to the modesetting driver (xorg internal, just remove any custom config and the xf86-video-intel package) for the time being, there are patches to help this slated for the 4.8 kernel as well from what I've heard. There are multiple threads on this issue already, search around a bit (one of the biggest ones being ill-titled as 'Firefox lags recently').

Last edited by V1del (2016-08-19 13:43:30)

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#3 2016-08-19 14:34:08

R00KIE
Forum Fellow
From: Between a computer and a chair
Registered: 2008-09-14
Posts: 4,734

Re: Intel driver & Skylake GPU

No major problems(1) here with the modesetting driver.

(1) I see some glitches when package c-states get to PC6 and PC7, but that seems to be a problem common to both modesetting and the intel driver.


R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K

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#4 2016-08-19 19:56:33

spidla
Member
Registered: 2016-08-19
Posts: 3

Re: Intel driver & Skylake GPU

Nice. It is working, no crashes so far. Performance looking good.

Thank you

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#5 2016-08-22 09:43:21

spidla
Member
Registered: 2016-08-19
Posts: 3

Re: Intel driver & Skylake GPU

OK, when I connect two monitors (DP, HDMI), problem is back even with modesetting driver.

Looks like the problem is not in AccelMethod, but in DRI. If I disable DRI3, it works, for now.

Last edited by spidla (2016-08-22 09:43:33)

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#6 2016-08-22 18:22:46

mcloaked
Member
From: Yorkshire, UK
Registered: 2012-02-02
Posts: 1,222

Re: Intel driver & Skylake GPU

I understand there are a lot of bugs and have been quite a few patches for DP connections to monitors - is it possible your two monitor setup with one of them DP might be hitting one of the many DP related kernel issues?


Mike C

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