On Fri, Jan 13, 2023 at 11:58:47PM -0500, Matthew Fahner wrote: > Hello, > > I'm running Ubuntu 20.10 and experienced a regression when trying > kernel 6.1.5 that was not present in previous kernels such as 6.0.19 > or 6.0.9 > > I have two monitors attached using DisplayPort MST (daisy chaining the > displays). > > Normally, this works without issue and both monitors are detected and > display properly. > > With kernel 6.1.5, the second monitor (the monitor that's not directly > connected to the computer) was detected but would not display. I > didn't spend much time troubleshooting the issue and instead reverted > to 6.0.19 where it again worked without issue. The first monitor > worked without issue. > > Let me know what steps I can take to help identify the root cause. Can you use 'git bisect' to track down the offending commit? thanks, greg k-h
