the test is radeon driver.
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https://bugs.launchpad.net/bugs/1858199
Title:
bugs in libvdpau_radeonsi.so and amdgpu(or radeon) driver freeze the
system
To manage notifications
today ,I test 5.3.24 generic kernel ,and use mpv vdpau and vaapi
hardware acceleration to play video ,the system don't freeze up to now
for a day .The problem seems only occur in lowlatency kernel .
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Bugs, which is
disable iommu or enable iommu by add "iommu=soft intel_iommu=off "
or "iommu=on intel_iommu=on" take the same result.But disable
intel_iommu it seems the graphical desktop response very smoothly.
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if you need furthure information and test I would like to provide.
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https://bugs.launchpad.net/bugs/1858199
Title:
bugs in libvdpau_radeonsi.so and amdgpu(or radeon) driver freeze
on kernel 4.15 serires I have some times sucessfully login to dump
the kernel error message by ssh when the system was frozen . the
attachment was the dmesg error message dump several weeks ago.
** Attachment added: "dmesg.error.tgz"
when enable radeon driver the kernel boot parameters is :
BOOT_IMAGE=/boot/vmlinuz-5.3.0-24-lowlatency
root=UUID=012b0ab8-e26f-4057-90c0-f4d52523776d ro security=tomoyo noquiet
TOMOYO_trigger=/lib/systemd/systemd nosplash scsi_mod.use_blk_mq=1 iommu=soft
intel_iommu=off vt.default_utf8=1
controller: Advanced Micro Devices, Inc. [AMD/ATI]
Cape Verde PRO [Radeon HD 7750/8740 / R7 250E].
infomation from uname -a :
Linux smzhou-desktop 5.3.0-24-lowlatency #26~18.04.2-Ubuntu SMP PREEMPT Tue Nov
26 14:39:35 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
** Affects: mesa (Ubuntu)
Importance
*** This bug is a duplicate of bug 1787127 ***
https://bugs.launchpad.net/bugs/1787127
I build custom kernel from ubuntu kernel source 3.13.0-158 with bfq patch
,bug still happen .The error message is :
[35952.358708] BUG: Bad page map in process java pte:01e67320 pmd:16efdd067
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