* [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled
@ 2019-07-31 18:11 bugzilla-daemon
2019-07-31 18:12 ` bugzilla-daemon
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From: bugzilla-daemon @ 2019-07-31 18:11 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=111272
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
--> https://bugs.freedesktop.org/attachment.cgi?id=144921&action=edit
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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* [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled
2019-07-31 18:11 [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled bugzilla-daemon
@ 2019-07-31 18:12 ` bugzilla-daemon
2019-07-31 18:12 ` bugzilla-daemon
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: bugzilla-daemon @ 2019-07-31 18:12 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=111272
--- Comment #1 from Parker Reed <parker.l.reed@gmail.com> ---
Created attachment 144922
--> https://bugs.freedesktop.org/attachment.cgi?id=144922&action=edit
DRI PRIME 1
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* [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled
2019-07-31 18:11 [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled bugzilla-daemon
2019-07-31 18:12 ` bugzilla-daemon
@ 2019-07-31 18:12 ` bugzilla-daemon
2019-07-31 18:15 ` bugzilla-daemon
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From: bugzilla-daemon @ 2019-07-31 18:12 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=111272
--- Comment #2 from Parker Reed <parker.l.reed@gmail.com> ---
Created attachment 144923
--> https://bugs.freedesktop.org/attachment.cgi?id=144923&action=edit
DRI PRIME 1 vblank mode 1
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* [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled
2019-07-31 18:11 [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled bugzilla-daemon
2019-07-31 18:12 ` bugzilla-daemon
2019-07-31 18:12 ` bugzilla-daemon
@ 2019-07-31 18:15 ` bugzilla-daemon
2019-07-31 18:25 ` bugzilla-daemon
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From: bugzilla-daemon @ 2019-07-31 18:15 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=111272
--- Comment #3 from Alex Deucher <alexdeucher@gmail.com> ---
Please attach your xorg log and dmesg output. Generally the laptop panel is
only physically connected to the integrated GPU so you have to use the
integrated GPU to get a display.
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* [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled
2019-07-31 18:11 [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled bugzilla-daemon
` (2 preceding siblings ...)
2019-07-31 18:15 ` bugzilla-daemon
@ 2019-07-31 18:25 ` bugzilla-daemon
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From: bugzilla-daemon @ 2019-07-31 18:25 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=111272
--- Comment #4 from Parker Reed <parker.l.reed@gmail.com> ---
I'm not using the laptop panel or connector. This is a Thunderbolt eGPU.
HDMI is direct into the external RX 560.
While testing I just realized this behavior has nothing to do with multi GPU.
Ran the same glxgears test on desktop that only has RX 480 and iGPU disabled in
BIOS. Same behavior.
$ DRI_PRIME=1 glxgears
Running synchronized to the vertical refresh. The framerate should be
approximately the same as the monitor refresh rate.
28663 frames in 5.0 seconds = 5732.486 FPS
26437 frames in 5.0 seconds = 5286.734 FPS
26203 frames in 5.0 seconds = 5239.404 FPS
26759 frames in 5.0 seconds = 5346.603 FPS
Will attach the current Xorg log.
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* [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled
2019-07-31 18:11 [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled bugzilla-daemon
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2019-07-31 18:25 ` bugzilla-daemon
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From: bugzilla-daemon @ 2019-07-31 18:27 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=111272
--- Comment #5 from Parker Reed <parker.l.reed@gmail.com> ---
Created attachment 144924
--> https://bugs.freedesktop.org/attachment.cgi?id=144924&action=edit
dmesg output
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* [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled
2019-07-31 18:11 [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled bugzilla-daemon
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From: bugzilla-daemon @ 2019-07-31 18:27 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=111272
--- Comment #6 from Parker Reed <parker.l.reed@gmail.com> ---
Created attachment 144925
--> https://bugs.freedesktop.org/attachment.cgi?id=144925&action=edit
Xorg log
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* [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled
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From: bugzilla-daemon @ 2019-07-31 18:46 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=111272
Alex Deucher <alexdeucher@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #144925|text/x-log |text/plain
mime type| |
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* [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled
2019-07-31 18:11 [Bug 111272] [DRI_PRIME] Error on multi GPU with only one enabled bugzilla-daemon
` (6 preceding siblings ...)
2019-07-31 18:46 ` bugzilla-daemon
@ 2019-08-02 9:08 ` bugzilla-daemon
7 siblings, 0 replies; 9+ messages in thread
From: bugzilla-daemon @ 2019-08-02 9:08 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=111272
Michel Dänzer <michel@daenzer.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|dri-devel@lists.freedesktop |mesa-dev@lists.freedesktop.
|.org |org
Component|DRM/AMDgpu |GLX
Version|XOrg git |unspecified
Product|DRI |Mesa
QA Contact| |mesa-dev@lists.freedesktop.
| |org
--- Comment #7 from Michel Dänzer <michel@daenzer.net> ---
Due to DRI_PRIME=1, libGL tries to initialize the i965 driver with DRI3, which
fails:
libGL error: Different GPU, but blitImage not implemented for this driver
libGL error: failed to load driver: i965
So it falls back to DRI2, which uses the AMD GPU, because the Intel one wasn't
initialized in Xorg. DRI2 doesn't support sync-to-vblank via PRIME.
Reassigning to Mesa for now, but DRI_PRIME=1 really isn't intended to be used
with a single GPU.
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