https://bugzilla.kernel.org/show_bug.cgi?id=58121
Niels Ole Salscheider niels_ole@salscheider-online.de changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |niels_ole@salscheider-onlin | |e.de
--- Comment #6 from Niels Ole Salscheider niels_ole@salscheider-online.de --- Created attachment 127381 --> https://bugzilla.kernel.org/attachment.cgi?id=127381&action=edit Possible fix
I tried a current git checkout and noticed that now only DisplayPort monitors cause the problem - VGA works fine. After debugging the issue a bit further I noticed that the problem seems to be caused by a shared PLL between the bridge chip and the DP monitor.
The attached patch fixes the issue for me but I am not sure if we must not share PLLs at all or just not with the bridge chip.