I’m up-to-date on Fedora 42 and after I updated the latest time (so whatever caused this showed up in the last week or so), my Lenovo Thinkpad with external monitor works great! Until it goes to lock the screen.
After locking the screen the external monitor continuously connects and disconnects until I log out and log back in. (At least a reboot isn’t necessary!)
This combined with the fact that Electron-based apps are unusable on my laptop display, because I scale it down to 85%, which means I need to adjust the scaling to close any work in an Electron app before logging out.
It would be helpful to anyone wishing to help you to include some more information like Desktop Environment, and more detail on hardware than just “Lenovo Thinkpad”.
Thank you! I don’t even know where to begin with this, other than to say, it’s worked flawlessly for two years with this machine, I’m sure nothing there has changed.
Operating System: Fedora Linux 42
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.9.3
Kernel Version: 6.18.10-100.fc42.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 20 × 12th Gen Intel® Core™ i7-12700H
Memory: 32 GiB of RAM (31.0 GiB usable)
Graphics Processor 1: Intel® Graphics
Graphics Processor 2: NVIDIA T600 Laptop GPU
Manufacturer: LENOVO
Product Name: 21D8005MGE
System Version: ThinkPad P15v Gen 3
Your goal should be to provide enough detail to allow others with similar hardware to reproduce the issue. Power management is one area that requires coordination between linux and vendor firmware.
I think my goal for a general-purpose, public discussion board might be a little different. Like it starts with a cry of help, and in this case an implicit* “Anybody else seeing this?” My system is super vanilla and 100% up-to-date, so I would expect other vanilla users would have also seen this issue. Based on the volume of replies, it doesn’t look like that’s the case.
Upon further investigation, I can also say that a dnf history rollback is not possible (is it even possible when more than one package has been updated, yikes!), so I was thinking of checking out f43 as you suggested.
Even though the issue looks like it’s related to the power system via the lock screen, does the power system deactivate/detach/disconnect an external monitor at a screen lock event? That would, be, um wild.