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[SOLVED] rendering issues on UHD Graphics 630
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Anton Gubarkov
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Joined: 13 Mar 2008
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PostPosted: Fri Oct 19, 2018 10:14 am    Post subject: [SOLVED] rendering issues on UHD Graphics 630 Reply with quote

I'm building a new Thinkpad P52 from scratch on Gentoo

I experience startnge rendering issues with gnome terminal (suddenly black or transparent background) and with google-chrome (all kinds of weird windows appear, no text input visible).

I suspected rendering and emerged virtualgl and tested with glxspheres64 - I didn't get the nice animation I expected. The picture seems to switch berween 2 frames - i.e. no animation, rotation of the daisy and flying spheres, but the starting terminal shows 60 frames per second,

I use VIDEO_CARDS="intel i965"

I'm out of ideas about where to debug further
Code:

anton@PF16W6Y2 ~ $ uname -a
Linux PF16W6Y2 4.18.14-gentoo-zfs #1 SMP PREEMPT Thu Oct 18 23:43:30 MSK 2018 x86_64 Intel(R) Core(TM) i7-8850H CPU @ 2.60GHz GenuineIntel GNU/Linux

anton@PF16W6Y2 ~ $ glxspheres64
Polygons in scene: 62464 (61 spheres * 1024 polys/spheres)
Visual ID of window: 0xcf
Context is Direct
OpenGL Renderer: Mesa DRI Intel(R) UHD Graphics 630 (Coffeelake 3x8 GT2)


[Moderator edit: added [code] tags to preserve output layout. -Hu]


Last edited by Anton Gubarkov on Sat Oct 20, 2018 9:30 pm; edited 1 time in total
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Anton Gubarkov
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PostPosted: Fri Oct 19, 2018 12:37 pm    Post subject: Reply with quote

The natural way is to try modesetting driver, but it doesn't work at all. the X server is killed:
Code:
[  3941.070] (II) Module modesetting: vendor="X.Org Foundation"
[  3941.071]    compiled for 1.20.2, module version = 1.20.2
[  3941.071]    Module class: X.Org Video Driver
[  3941.071]    ABI class: X.Org Video Driver, version 24.0
[  3941.071] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[  3941.071] (WW) Falling back to old probe method for modesetting
[  3941.071] (II) modeset(1): using default device
[  3941.071] (II) modeset(G0): using drv /dev/dri/card0
[  3941.071] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card support
[  3941.071] (EE) Screen 0 deleted because of no matching config section.
[  3941.071] (II) UnloadModule: "modesetting"


[Moderator edit: added [code] tags to preserve output layout. -Hu]
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Anton Gubarkov
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PostPosted: Sat Oct 20, 2018 8:30 pm    Post subject: Reply with quote

update: glxgears don't work either. The gears appear to be stuck and moving forward/backward (alternating between 2 frames), no rotation.

They kind of rotate when I resize the window.
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Anton Gubarkov
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PostPosted: Sat Oct 20, 2018 9:30 pm    Post subject: Reply with quote

I managed to start modesetting driver by specifying BusID in xorg.conf.d for the device.
I do have optimus laptopm but I it is not my 1st one.

Previous Thinkpad T540p didn't require any xorg.conf.d modifications.
I've also put BusID for bumblebee xorg.conf.nvidia and my optirun started to work flawlessly.

Apparently xf86-video-intel has a serious bug

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