* [Bug 107309] libGL error: MESA-LOADER: failed to retrieve device information on virgl
@ 2018-07-20 13:28 bugzilla-daemon
2018-07-24 15:35 ` bugzilla-daemon
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: bugzilla-daemon @ 2018-07-20 13:28 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=107309
Bug ID: 107309
Summary: libGL error: MESA-LOADER: failed to retrieve device
information on virgl
Product: DRI
Version: XOrg git
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: libdrm
Assignee: dri-devel@lists.freedesktop.org
Reporter: vliaskovitis@suse.com
Created attachment 140732
--> https://bugs.freedesktop.org/attachment.cgi?id=140732&action=edit
xf86drm: Correctly parse pci device information for virtio gpu
Mesa 18.1.3-201.1
kernel 4.17.5-1-default
libdrm 2.4.92-1.2
glxinfo | grep -i renderer
OpenGL renderer string: virgl
LIBGL_DEBUG=verbose glxgears
libGL error: MESA-LOADER: failed to retrieve device information
libGL: using driver virtio_gpu for 4
libGL: OpenDriver: trying /usr/lib64/dri/tls/virtio_gpu_dri.so
libGL: OpenDriver: trying /usr/lib64/dri/virtio_gpu_dri.so
Adding some debug drmMsg() prints, I found that the MESA-LOADER error message
happens because drmGetDevice2() returns -ENODEV. And that happens because
drmParseSubsystemType() returns -EINVAL.
drmParseSubsystemType() expects /sys/dev/char/DRM_MAJOR\:0/device/subsystem to
be one of pci, usb, platform, hostix. But virtio-gpu has bus subsystem virtio:
ls -al /sys/dev/char/226\:0/device/subsystem
lrwxrwxrwx 1 root root 0 Jul 19 17:39 /sys/dev/char/226:0/device/subsystem ->
../../../../bus/virtio
ls -al /sys/dev/char/226\:128/device/subsystem
lrwxrwxrwx 1 root root 0 Jul 19 17:39 /sys/dev/char/226:128/device/subsystem ->
../../../../bus/virtio
I am not sure if this is a cosmetic error, or if it matters. I am attaching a
proposed patch.
Since the virtio-gpu device is actually a pci device, we can still parse the
correct information from the corresponding pci device:
ls -al /sys/dev/char/226\:0
lrwxrwxrwx 1 root root 0 Jul 20 13:30 /sys/dev/char/226:0 ->
../../devices/pci0000:00/0000:00:02.0/virtio0/drm/card0
i.e. use /sys/dev/char/226\:128/../../../ instead of /sys/dev/char/226\:128/
for virtio devices.
to parse subsystem, and subsequently pci bus and pci device information.
(Let me know if bugzilla is still the place to report bugs, or if
https://gitlab.freedesktop.org/mesa/drm is now the preferred location)
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* [Bug 107309] libGL error: MESA-LOADER: failed to retrieve device information on virgl
2018-07-20 13:28 [Bug 107309] libGL error: MESA-LOADER: failed to retrieve device information on virgl bugzilla-daemon
@ 2018-07-24 15:35 ` bugzilla-daemon
2018-07-24 15:36 ` bugzilla-daemon
2018-07-24 17:26 ` bugzilla-daemon
2 siblings, 0 replies; 4+ messages in thread
From: bugzilla-daemon @ 2018-07-24 15:35 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=107309
--- Comment #1 from Emil Velikov <emil.l.velikov@gmail.com> ---
The message is harmless since Mesa falls back to use the DRM driver name.
That said, a slightly better (I'm obviously biased) solution has been on the
list for ~month [1]. Just double-checked and pushed it to master.
[1] https://lists.freedesktop.org/archives/dri-devel/2018-June/181067.html
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* [Bug 107309] libGL error: MESA-LOADER: failed to retrieve device information on virgl
2018-07-20 13:28 [Bug 107309] libGL error: MESA-LOADER: failed to retrieve device information on virgl bugzilla-daemon
2018-07-24 15:35 ` bugzilla-daemon
@ 2018-07-24 15:36 ` bugzilla-daemon
2018-07-24 17:26 ` bugzilla-daemon
2 siblings, 0 replies; 4+ messages in thread
From: bugzilla-daemon @ 2018-07-24 15:36 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=107309
Emil Velikov <emil.l.velikov@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|NEW |RESOLVED
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* [Bug 107309] libGL error: MESA-LOADER: failed to retrieve device information on virgl
2018-07-20 13:28 [Bug 107309] libGL error: MESA-LOADER: failed to retrieve device information on virgl bugzilla-daemon
2018-07-24 15:35 ` bugzilla-daemon
2018-07-24 15:36 ` bugzilla-daemon
@ 2018-07-24 17:26 ` bugzilla-daemon
2 siblings, 0 replies; 4+ messages in thread
From: bugzilla-daemon @ 2018-07-24 17:26 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=107309
--- Comment #2 from Vasilis LIaskovitis <vliaskovitis@suse.com> ---
Cool, thanks!
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2018-07-20 13:28 [Bug 107309] libGL error: MESA-LOADER: failed to retrieve device information on virgl bugzilla-daemon
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