https://bugzilla.kernel.org/show_bug.cgi?id=219748 --- Comment #31 from Mika Westerberg (mika.westerberg@xxxxxxxxxxxxxxx) --- (In reply to Mario Limonciello (AMD) from comment #30) > > I'm leaving the graphics side for Mario to comment on as I'm not qualified. > I > > do see MST and that seem to be problematic in Linux IIRC. > > My main worry is if the retimer scan is the reason for the DPIA issues too. > The report that Sean linked in was a failing to read an EDID which got fixed > by pushing the scan later. > > So if you can reproduce the display issues try with it commented out > entirely (maybe we want that for debugging as a module parameter Mika?). I'm not convinced that retimer scanning has anything to do with that issue. It does affect timing when the device router is enumerated and that's the issue with Pluggable, they have implemented some sort of non-standard timeout there. The other issue happens long after device router is already enumerated and the DP tunnels are established. The patch may seem to "solve" the issue but it probably just hides the real one and this is what we need to understand. Therefore I suggest to open a separate issue for that one with appropriate full dmesg and the repro steps, CC me too I can take a look. We can defer this fix until we understand the real problem but let's keep the two separate. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
