[SRU][Eoan][raspi2][PATCH 0/1] Need to disable CONFIG_DRM_V3D in the raspi2 eoan kernel

Hui Wang hui.wang at canonical.com
Mon Nov 25 01:40:50 UTC 2019


BugLink: https://bugs.launchpad.net/bugs/1853789

The kernel 5.3.0-1013.15-raspi2 is in the proposed channel, users did
some tests with this kernel, found the v3d driver will crash or print
lots of calltrace under desktop, so we need to revert the patch in
the 1013 kernel to disable this driver again.


[Impact]
According to the #1852035 and #1850876, users reported that the driver
v3d will crash under desktop, then I checked the upstream kernel, the
branch rpi-5.3.y was merged some fixes for v3d driver on Nov 11, I
tested this branch myself, found the driver still has some problem.
I also applied those patches to eoan kernel and built a testing
kernel, users reported similar problems with this testing kernel.

So the safest way is to disable this driver in the kernel agian, until
the branch rpi-5.3.y has the fixes for this driver. Or we could
investigate and backport fixes from rpi-4.19.y later.

[Fix]
Revert a patch in the 1013 kernel.


[Test Case]
Users tested 1012 kernel a lot, they didn't report the unstable issues,
and before the 1013, this driver was always disabled.

[Regression Risk]
Low, just revert a new enabled driver in the 1013 kernel.


Hui Wang (1):
  UBUNTU: [config] raspi2: Revert "UBUNTU: [config] raspi2:
    CONFIG_DRM_V3D=m"

 debian.raspi2/config/annotations          | 1 -
 debian.raspi2/config/config.common.ubuntu | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

-- 
2.17.1




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