This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1971699
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1971699
Title:
disable Intel DMA remapping by default
Status in linux package in Ubuntu:
Incomplete
Bug description:
[Impact]
It seems that enabling Intel IOMMU can cause some weird gfx problems, see for
example:
https://bugs.launchpad.net/bugs/1971146
https://bugs.launchpad.net/bugs/1965882
[Test case]
We don't have any specific test case, only other bug reports that
tracked down the origin of the issue as being introduced when
CONFIG_INTEL_IOMMU_DEFAULT_ON has been enabled by default.
[Fix]
Revert "UBUNTU: [Config] enable Intel DMA remapping options by
default"
[Regression potential]
DMA remapping device not present at boot by default, users that
require this feature will need to specifically add intel_iommu=on to
the kernel boot parameters to enable it.
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