| Bug ID | 111272 |
|---|---|
| Summary | [DRI_PRIME] Error on multi GPU with only one enabled |
| Product | DRI |
| Version | XOrg git |
| Hardware | Other |
| OS | All |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | DRM/AMDgpu |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | parker.l.reed@gmail.com |
Created attachment 144921 [details]
DRI PRIME 0
I have a Razer Blade Stealth late 2016 with a Razer Core V1 and an RX 560.
Arch Linux
Linux stealth 5.2.1-arch1-1-fsync #1 SMP PREEMPT Mon Jul 22 17:40:06 PDT 2019
x86_64 GNU/Linux
mesa-aco-git 19.2.0_devel.114720.5c6077221dd-1 (Also happens on normal mesa-git
and mesa stable)
With only the AMDGPU enabled for Xorg, DRI_PRIME=1 attempts to use Intel, falls
back to AMD as expected, but has the weird behavior of completely bypassing
vsync. DRI_PRIME=0 works as expected
Expected behavior is to ignore the Intel card since it's not currently loaded
in Xorg. I can obviously set DRI_PRIME=0 and be fine, but the DRI_PRIME=1
behavior seems to be a bug.
Xorg conf
Section "Device"
Identifier "AMD"
Driver "amdgpu"
BusID "PCI:07:0:0"
EndSection
xrandr corroborates this in the listproviders output
Providers: number : 1
Provider 0: id: 0x57 cap: 0xf, Source Output, Sink Output, Source Offload, Sink
Offload crtcs: 5 outputs: 3 associated providers: 0 name:AMD Radeon (TM) RX 460
Graphics @ pci:0000:07:00.0
DRI_PRIME=1 glxinfo reports the same info aside from an error at the top of the
output
libGL error: Different GPU, but blitImage not implemented for this driver
libGL error: failed to load driver: i965
Full glxinfo attached for DRI_PRIME=0, DRI_PRIME=1, and DRI_PRIME=1 with
vblank_mode=1
glxgears for FPS example
$ DRI_PRIME=0 glxgears
Running synchronized to the vertical refresh. The framerate should be
approximately the same as the monitor refresh rate.
333 frames in 5.0 seconds = 66.549 FPS
300 frames in 5.0 seconds = 59.999 FPS
300 frames in 5.0 seconds = 59.997 FPS
301 frames in 5.0 seconds = 60.001 FPS
$ DRI_PRIME=1 glxgears
libGL error: Different GPU, but blitImage not implemented for this driver
libGL error: failed to load driver: i965
Running synchronized to the vertical refresh. The framerate should be
approximately the same as the monitor refresh rate.
42158 frames in 5.0 seconds = 8431.391 FPS
42406 frames in 5.0 seconds = 8481.144 FPS
42266 frames in 5.0 seconds = 8453.060 FPS
42444 frames in 5.0 seconds = 8488.649 FPS
$ vblank_mode=1 DRI_PRIME=1 glxgears
libGL error: Different GPU, but blitImage not implemented for this driver
libGL error: failed to load driver: i965
ATTENTION: default value of option vblank_mode overridden by environment.
42081 frames in 5.0 seconds = 8415.999 FPS
42527 frames in 5.0 seconds = 8505.298 FPS
42591 frames in 5.0 seconds = 8518.191 FPS
42508 frames in 5.0 seconds = 8501.433 FPS
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