Summary: | KScreen EDID reading is extremely error-prone | ||
---|---|---|---|
Product: | [Plasma] KScreen | Reporter: | jackyguo18 |
Component: | common | Assignee: | kscreen-bugs-null <kscreen-bugs-null> |
Status: | RESOLVED FIXED | ||
Severity: | normal | CC: | matthewtrescott, nate, notmart |
Priority: | NOR | ||
Version: | 5.25.1 | ||
Target Milestone: | --- | ||
Platform: | Arch Linux | ||
OS: | Linux | ||
See Also: | https://bugzilla.gnome.org/show_bug.cgi?id=779837 | ||
Latest Commit: | Version Fixed In: | 5.27 | |
Attachments: | kscreen-console bug when EDID is not read correctly |
Description
jackyguo18
2022-05-17 20:49:05 UTC
Very interesting observations, thanks. I have noticed the same bug, but I am not sure it is caused by reading the EDID before it is fully connected, exactly. It may be that KScreen tries to read it before the EDID info is _fully transferred_. My reasoning for this is that I see the same problem when plugging in a display that's connected via USB-C dock (where the port would have to be fully connected in order to do the handshaking necessary to switch to DP alt mode). Possibly related reddit post: https://www.reddit.com/r/kde/comments/staakr/unknown_displays/ If anything, a small workaround *might* be possible, but I can't seem to find a way to force KScreen to reload its configuration. Update with 5.25.1: the bug seems to persist somewhat. If I launch Plasma without plugging in my monitor, the first time I plug it in, it will show as "unknown HDMI-A-1 unknown". However, when I plug it in the second time, it is recognized correctly. Still quite annoying. does this happen on wayland? x11? or both? Only happens on Wayland in my testing. Kernel 6.2.1 and Plasma 5.27.2, can no longer reproduce this issue. I guess it must be fixed! Good news! Makes sense given all the multi-monitor fixes that made it into that release. Jacky Guo, what about you? Are you able to reproduce the bug in Plasma 5.27.2 or later? Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone! This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone! |