On 7/6/23 17:45, Dr. David Alan Gilbert wrote: > * Bagas Sanjaya (bagasdotme@xxxxxxxxx) wrote: >> Hi, >> >> I notice a regression report on Bugzilla [1]. Quoting from it: >> >>> >>> In the latest 6.3 and 6.4, it is impossible for me to boot my laptop if my DELL U2720Q monitor is plugged in (USB-C). I have to unplug it, then boot. As soon as the first second of boot went through, I can plug in my monitor and there is no issue afterward. There is no issue waking up after suspend. Only when it boots. >>> >>> See the attached pictures of the trace. The trace itself seems random (at least to me :)). I tried several things, like removing any attached USB devices from the monitor built-in USB-hub, but that does not change anything. (there is a keyboard and trackpad attached). >> >> See Bugzilla for the full thread. >> >> Unfortunately, the reporter can only provide photos of kernel trace >> (as he doesn't have any other means to extract kernel logs, maybe >> connecting over serial helps; see Bugzilla for these attachments). > > I note the photos have 'crud' at the bottom; as if something interesting > is in the video ram; perhaps something is freaked out by this nice 4k > monitor and some useful data structures are ending up in video ram. > > (Also note it's a librem with pureboot) > > Dave > >> >> Anyway, I'm adding it to regzbot so that it doesn't fall through >> cracks unnoticed: >> >> #regzbot introduced: v6.1..v6.3 https://bugzilla.kernel.org/show_bug.cgi?id=217637 >> #regzbot title: unable to boot with Dell U2720Q monitor attached >> >> Thanks. >> >> [1]: https://bugzilla.kernel.org/show_bug.cgi?id=217637 So what are __pfx_worker_thread and __pfx_kthread? Where are they from? -- ~Randy
