Thanks for the detailed analysis and the test kernel — really helpful context.
I installed all the .deb files from the Canonical link and booted into the test kernel. I then set up remote log capture from a second machine using SSH + dmesg -w before reproducing the issue: ssh user@testmachine 'sudo dmesg -w' | tee 6.17.0-1016-debug.log With that running, I enabled the debug flags on the test machine: echo 0x4 | sudo tee /sys/module/drm/parameters/debug echo 'file drivers/usb/typec/class.c +pt' | sudo tee /sys/kernel/debug/dynamic_debug/control echo 'file drivers/usb/typec/ucsi/ucsi.c +pt' | sudo tee /sys/kernel/debug/dynamic_debug/control echo 'file drivers/usb/typec/ucsi/displayport.c +pt' | sudo tee /sys/kernel/debug/dynamic_debug/control I was able to plug and unplug the second USB-C monitor a few times successfully, but eventually the system crashed as it has been doing. The remote log capture was still running on the second machine so I was able to grab the full dmesg output up to the point of the crash. I've attached the logs from the session. Let me know if you need anything else or if you'd like me to try a different reproduction step. ** Attachment added: "6.17.0-1016-debug.log" https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.17/+bug/2141225/+attachment/5949787/+files/6.17.0-1016-debug.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2141225 Title: Kernel panic when connecting USB-C Dell monitors on Ubuntu kernel 6.17.0-14-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.17/+bug/2141225/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
