This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
focal' to 'verification-done-focal'. If the problem still exists, change
the tag 'verification-needed-focal' to 'verification-failed-focal'.
If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.
See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!
** Tags added: verification-needed-focal
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https://bugs.launchpad.net/bugs/1931147
Title:
Fix non-working GPU on Some HP desktops
Status in HWE Next:
New
Status in linux package in Ubuntu:
Confirmed
Status in linux-oem-5.10 package in Ubuntu:
Invalid
Status in linux source package in Focal:
Won't Fix
Status in linux-oem-5.10 source package in Focal:
Fix Committed
Status in linux source package in Hirsute:
Fix Committed
Status in linux-oem-5.10 source package in Hirsute:
Invalid
Bug description:
[Impact]
Integrated GPU on AMD based HP desktop doesn't work.
[Fix]
Coalesce host bridge contiguous apertures so the resources requested by
child devices can be met.
[Test]
Boot affected systems. No picture from the iGPU.
With the patch applied, iGPU can work normally.
[Where problems could occur]
Assume there are device A and device B and they request overlapped
resource region, the original logic may not be able to allocate enough
resource for A so device B claimed the resource in the end.
Once the fix is applied, the region may be big enough for device A,
hence device B won't be able to get the resource it needs.
Hopefully we don't have such broken systems.
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