[PATCH 0/1][SRU][E] drm/i915/fbc: disable framebuffer compression on IceLake

[You-Sheng Yang]

BugLink: https://bugs.launchpad.net/ubuntu/bug/1840236

[Impact]
On IceLake platforms there might be a thin, horizon strap of corruption
image at the top of screen randomly after some series of window
operations and disappears within a second or so. This is found on
multiple platforms and is quite annonying that results in bad user
experience.

[Fix]
The upstream bug has been filed for previous platforms, e.g. GeminiLake
for an year or so, still working in progress, and so far this only known
work-around is to turn off framebuffer compression on affected platforms.

[Test Case]
The most easy way is to observe if such corruption appears during the
transition from GDM to gnome-shell.

[Regression Risk]
Low. The work-around for GeminiLake was landed to Linux stable 4.14.125
and has been backported to B/D.

You-Sheng Yang (1):
  UBUNTU: SAUCE: drm/i915/fbc: disable framebuffer compression on
    IceLake

 drivers/gpu/drm/i915/intel_fbc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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2.23.0