Ubuntu
xserver-xorg-video-intel package

  1. Bug #1522922
  2. Comment #64

Comment 64 for bug 1522922

Revision history for this message
In , Mika-kahola (mika-kahola) wrote :

Thank you Tom for the syslog. From the log the DP link training is completed but for some reason the DP channel equalization fails. At this point we request to do link training once again and now first we try first the drive current and pre-emphasis levels from the previous link training. Instead of reusing these values, we should restart the link training with zero drive current and pre-emphasis levels. This is fixed at the 3rd patch of this series.

Please, try out this series of patches on top of the drm-intel-nighly and report back.

https://patchwork.freedesktop.org/patch/69394/
https://patchwork.freedesktop.org/patch/69395/
https://patchwork.freedesktop.org/patch/69396/

flux242 seems to have a clock recovery issue. This fix may provide a solution for that as well.