* [Bug 203339] New: AMDGPU: virtual_display disables physical outputs
@ 2019-04-16 22:51 bugzilla-daemon
2019-04-17 4:05 ` [Bug 203339] " bugzilla-daemon
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: bugzilla-daemon @ 2019-04-16 22:51 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=203339
Bug ID: 203339
Summary: AMDGPU: virtual_display disables physical outputs
Product: Drivers
Version: 2.5
Kernel Version: 5.0.7
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - non Intel)
Assignee: drivers_video-dri@kernel-bugs.osdl.org
Reporter: parker.l.reed@gmail.com
Regression: No
Created attachment 282351
--> https://bugzilla.kernel.org/attachment.cgi?id=282351&action=edit
Kernel log
Unable to tell if this is intended or if caused by a crash.
I have a monitor connected via HDMI. When I use the virtual_display kernel
parameter, only the virtual displays show up.
amdgpu.virtual_display=0000:07:00.0,2
Original patchset doesn't mention this usecase.
https://lists.freedesktop.org/archives/amd-gfx/2016-August/001058.html
Kernel log attached shows some crashes related to dce_virtual_crtc
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* [Bug 203339] AMDGPU: virtual_display disables physical outputs
2019-04-16 22:51 [Bug 203339] New: AMDGPU: virtual_display disables physical outputs bugzilla-daemon
@ 2019-04-17 4:05 ` bugzilla-daemon
2020-09-02 15:18 ` bugzilla-daemon
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2019-04-17 4:05 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=203339
Alex Deucher (alexdeucher@gmail.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |alexdeucher@gmail.com
--- Comment #1 from Alex Deucher (alexdeucher@gmail.com) ---
(In reply to Parker Reed from comment #0)
>
> I have a monitor connected via HDMI. When I use the virtual_display kernel
> parameter, only the virtual displays show up.
When you enable the virtual display option the real displays are disabled.
That is the intended behavior. It's not a crash just a warning.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug 203339] AMDGPU: virtual_display disables physical outputs
2019-04-16 22:51 [Bug 203339] New: AMDGPU: virtual_display disables physical outputs bugzilla-daemon
2019-04-17 4:05 ` [Bug 203339] " bugzilla-daemon
@ 2020-09-02 15:18 ` bugzilla-daemon
2020-09-02 16:00 ` bugzilla-daemon
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2020-09-02 15:18 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=203339
Drath (kernel.org@drath.ru) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kernel.org@drath.ru
--- Comment #2 from Drath (kernel.org@drath.ru) ---
>When you enable the virtual display option the real displays are disabled.
>That is the intended behavior.
Why, though? Is it necessary part of this functionality or is it just a
failsafe?
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^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug 203339] AMDGPU: virtual_display disables physical outputs
2019-04-16 22:51 [Bug 203339] New: AMDGPU: virtual_display disables physical outputs bugzilla-daemon
2019-04-17 4:05 ` [Bug 203339] " bugzilla-daemon
2020-09-02 15:18 ` bugzilla-daemon
@ 2020-09-02 16:00 ` bugzilla-daemon
2020-10-21 8:57 ` bugzilla-daemon
2020-10-21 12:47 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2020-09-02 16:00 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=203339
--- Comment #3 from Alex Deucher (alexdeucher@gmail.com) ---
(In reply to Drath from comment #2)
> >When you enable the virtual display option the real displays are disabled.
> >That is the intended behavior.
>
> Why, though? Is it necessary part of this functionality or is it just a
> failsafe?
It's a lot of work to make them all work together and it has not been
implemented. Plus for he main uses of virtual displays (virtualized GPUs and
early bring up and emulation), there is no physical display hardware available
or it's not ready to be used.
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* [Bug 203339] AMDGPU: virtual_display disables physical outputs
2019-04-16 22:51 [Bug 203339] New: AMDGPU: virtual_display disables physical outputs bugzilla-daemon
` (2 preceding siblings ...)
2020-09-02 16:00 ` bugzilla-daemon
@ 2020-10-21 8:57 ` bugzilla-daemon
2020-10-21 12:47 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2020-10-21 8:57 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=203339
vita.amaro@gmail.com (vita.amaro@gmail.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vita.amaro@gmail.com
--- Comment #4 from vita.amaro@gmail.com (vita.amaro@gmail.com) ---
But what if i need virtual display in order to use it as a second monitor via
vnc? There is no way...
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* [Bug 203339] AMDGPU: virtual_display disables physical outputs
2019-04-16 22:51 [Bug 203339] New: AMDGPU: virtual_display disables physical outputs bugzilla-daemon
` (3 preceding siblings ...)
2020-10-21 8:57 ` bugzilla-daemon
@ 2020-10-21 12:47 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2020-10-21 12:47 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=203339
--- Comment #5 from Alex Deucher (alexdeucher@gmail.com) ---
(In reply to vita.amaro@gmail.com from comment #4)
> But what if i need virtual display in order to use it as a second monitor
> via vnc? There is no way...
Patches welcomed.
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