** Changed in: xserver-xorg-driver-ati
Status: Unknown => New
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Title:
[radeon] Display output laggy from iGPU when operating on desktop
** Changed in: oem-priority
Status: In Progress => Confirmed
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Title:
[radeon] Display output laggy from iGPU when operating on desktop
** Also affects: xserver-xorg-driver-ati via
https://gitlab.freedesktop.org/xorg/driver/xf86-video-ati/-/issues/194
Importance: Unknown
Status: Unknown
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Hi Daniel,
Thank you for sharing.
We are not allow to provide a customization as workaround before we know the
fix plan.
I reported an upstream issue:
https://gitlab.freedesktop.org/xorg/driver/xf86-video-ati/-/issues/194
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Hi Daniel,
Thank you for sharing.
OEM team is not allow the provide a customization as workaround before we don't
know the plan to fix.
I reported an issue as
https://gitlab.freedesktop.org/xorg/driver/xf86-video-ati/-/issues/194
** Bug watch added:
Anyway, for this bug my thinking is that if a different config satisfies
the OEM then that can be considered as a semipermanent workaround.
Other than that, it looks like the bug needs to be reported upstream to
https://gitlab.freedesktop.org/xorg/driver/xf86-video-ati
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Good point. Running 'man amdgpu' I can immediately see one such good
reason:
Option "TearFree" "boolean"
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Title:
[radeon] Display output
because the native drivers have features that modesetting_drv does not
have, and how AMD expects them to be used
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Title:
[radeon] Display output
I've subscribed Timo who should know why Ubuntu still prefers 'radeon'
and 'amdgpu' Xorg drivers.
But also I am only guessing that my recommended config changes will fix
the issue. It would be useful to test them too.
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@Daniel,
u@u-HP-EliteDesk-800-G6-Tower-PC:~$ dpkg -S
/usr/share/X11/xorg.conf.d/10-radeon.conf
xserver-xorg-video-radeon: /usr/share/X11/xorg.conf.d/10-radeon.conf
u@u-HP-EliteDesk-800-G6-Tower-PC:~$ dpkg -S
/usr/share/X11/xorg.conf.d/10-amdgpu.conf
xserver-xorg-video-amdgpu:
I'm slightly worried you might be hitting multiple different bugs there.
But instead of worrying, maybe just try the 'modesetting' driver. It
might solve even more problems if you get both GPUs using the same
driver:
Section "OutputClass"
Identifier "Use Modesetting"
MatchDriver
Hi Daniel,
Thanks for sharing comment#27.
Let me summarize the reproduce scenarios in Intel + AMD case.
1. Boot from iGPU -> switch to dGPU -> switch back to iGPU -> iGPU lag.
2. Boot from iGPU -> connect secondary monitor to dGPU -> remove 1st monitor
from iGPU -> dGPU lag.
3. Boot from iGPU
As a workaround you should be able to avoid the radeon Xorg driver with
a custom config, something like:
Section "Device"
Identifier "devname"
Driver "modesetting"
BusID "pci:bus:dev:func"
...
EndSection
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Or just remove/edit /usr/share/X11/xorg.conf.d/10-radeon.conf
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Title:
[radeon] Display output laggy from iGPU when operating on desktop with
As a workaround you should be able to avoid the radeon Xorg driver with
a custom config, something like:
Section "Device"
Identifier "MyRadeon"
Driver "modesetting"
BusID "pci:1:0:0"
EndSection
Then it will use the same interfaces as in a Wayland
Combining the above two ideas you could add a new config file (make sure
its name loads before "10-radeon.conf"):
Section "OutputClass"
Identifier "MyRadeon"
MatchDriver "radeon"
Driver "modesetting"
EndSection
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** Changed in: oem-priority
Status: Confirmed => In Progress
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Title:
[radeon] Display output laggy from iGPU when operating on desktop
Hi Daniel,
I could reproduce this issue when using today hirsute daily build
$ sha256sum ~/Downloads/hirsute-desktop-amd64.iso
4908a5c919f4b796a856be69a044334eb1a910727180618348db0a8a1ef70360
/home/jeremysu/Downloads/hirsute-desktop-amd64.iso
after switching back to xorg (hirsute default
The other finding for comment#20.
If connecting two monitors then there is a way to reproduce it.
1. Set iGPU as primary monitor
2. Run an application from secondary display (dGPU) (e.g. glxgear)
3. Moving the application from secondary display (dGPU) to primary display
(iGPU) then the issue
Comment #19 is probably important to answer because we need to know if
we're looking for a backport or a whole new upstream fix.
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Title:
BTW, for i915 case, it's not 100% reproduce if the boot-vga-device is
i915.
Which means in Intel + AMD platform.
Sometime the system laggy when output from dGPU (AMD 430).
Sometime the system laggy when output from iGPU (intel) AFTER switching the
monitor between dGPU and iGPU (e.g. boot vga:
Another useful thing that would be easy to test: Does the same bug occur
in hirsute?
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Title:
[radeon] Display output laggy from iGPU when
Hi Daniel,
The "AMD R7 430" is the product name of the graphic card.
https://ssl.www8.hp.com/emea_africa/en/products/oas/product-detail.html?oid=26185185
I guess it's related to radeon driver since we could see this issue with
amd RX550 as well.
** Tags added: originate-from-1923120
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