[Bug 105469] i915 always chooses the alternate fixed display mode on the eDP

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105469

Mark Spencer <n7u4722r35 at ynzlx.anonbox.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|CLOSED                      |REOPENED
         Resolution|WORKSFORME                  |---

--- Comment #4 from Mark Spencer <n7u4722r35 at ynzlx.anonbox.net> ---
Yes, it still occurs:

$ uname -a
Linux 4.17.0-rc2

$ glxgears                                                                      
249 frames in 5.0 seconds = 49.732 FPS
241 frames in 5.0 seconds = 48.033 FPS
241 frames in 5.0 seconds = 48.034 FPS
241 frames in 5.0 seconds = 48.033 FPS
216 frames in 5.0 seconds = 43.100 FPS
241 frames in 5.0 seconds = 48.033 FPS

Main discussion is here: https://bugs.freedesktop.org/show_bug.cgi?id=103497

To sum up:

It's regression
It occurs since Linux 4.14
It's bisected to dc911f5bd8aacfcf8aabd5c26c88e04c837a938e (drm/i915/edp: Allow
alternate fixed mode for eDP if available.)
It can be fixed either by adding
https://bugs.freedesktop.org/attachment.cgi?id=135277 or reverting bisected
commit.

It's sad that having all of the above doesn't result in any action from
upstream developers for a half year.

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