Xorg problem on Skylake

[karu.pruun]

I can report some success. I took advice from this thread

https://bbs.archlinux.org/viewtopic.php?id=140315

in xorg.conf I disabled eDP1 and allowed only HDMI2 with mode
"1680x1050". This gives me the desired resolution and a working and
stable display. I did not turn off acceleration. There's occasional
minor blurring of text in e.g. Firefox which goes away when you scroll
down etc. But all in all it's stable so far.

The problem is obviously changing between different modes and back to
text---that does not work. But since I won't need it anyway I'm happy
so far.

Cheers

Peeter

--







On Mon, Feb 15, 2016 at 12:55 PM, karu.pruun <karu.pruun at gmail.com> wrote:
> Thank you, I'll try this tonight.
>
> On the bright side, Xorg is kind of stable in the sense that the
> corruption is systematic and the server does not crash.
>
> Peeter
>
> --
>
>
> On Mon, Feb 15, 2016 at 9:39 AM, Matthew Dillon <dillon at backplane.com> wrote:
>> On skylake, not yet... all you can do is turn off acceleration in
>> /etc/X11/xorg.conf (if you are running X without an /etc/X11/xorg.conf you
>> have to mess around and set one up, then turn off acceleration in it).
>> SkyLake support only just recently started to go in and it is guaranteed to
>> be unstable.  We haven't synchronized the code to the point where it is
>> supported well yet.
>>
>> -Matt
>>
>> On Sun, Feb 14, 2016 at 2:02 PM, karu.pruun <karu.pruun at gmail.com> wrote:
>>>
>>> Hello
>>>
>>> I am having trouble getting Xorg working on a Skylake machine with
>>> Intel integrated graphics (dmesg and Xorg log attached; a few errors
>>> on drm at the end of dmesg too), on this snapshot:
>>>
>>> ---
>>> DragonFly mars 4.5-DEVELOPMENT DragonFly 4.5-DEVELOPMENT #0: Wed Feb
>>> 10 11:57:30 UTC 2016
>>> root at pkgbox64.dragonflybsd.org:/usr/obj/usr/src/sys/X86_64_GENERIC
>>> x86_64
>>> ---
>>>
>>> I am not using xorg.conf and start Xorg with startx and .xinitrc that
>>> starts a mate-session. Several issues:
>>>
>>> - Xorg starts up and for some reason outputs to two devices, eDP1 and
>>> HDMI2. I only have one monitor at HDMI2; it can do 1680x1050 but since
>>> Xorg finds that eDP1 can have max resolution up to 1024x760 it forces
>>> the latter resolution on my monitor. Can I force it have only HDMI2,
>>> i.e. the one that actually has a monitor attached?
>>>
>>> - But even at 1024x768 the screen starts corrupting when I move
>>> windows, text becomes occasionally blurred etc. When I log out of mate
>>> to return to text screen, I get a black screen. The system is not
>>> frozen, all I can do is reboot.
>>>
>>> - In the 1024x768 mode, when I try to change the resolution with xrandr:
>>>
>>> # xrandr --output HDMI2 --auto
>>>
>>> Xorg does change the mode to 1680x1050, i.e. the native resolution of
>>> the monitor, but the screen is half-corrupted and unusable. When I
>>> exit to text screen I succeed the first time; but the text mode is now
>>> something like 128x48 or similar and in the top left quarter of the
>>> display. When I start Xorg again I get a half-corrupted screen; upon
>>> return to text mode it gives a blank or a frozen screen---all I can do
>>> is reboot.
>>>
>>> Is there anything one can do?
>>>
>>> Thanks
>>>
>>> Peeter
>>>
>>> --
>>
>>