Workaround: boot with laptop open and close once the desktop appears. The same problems appears when the laptop awakens from sleep mode. The workaround for this is to CTL-ALT-F2 followed by CTL-ALT-F1.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed in Ubuntu. https://bugs.launchpad.net/bugs/2017364 Title: laptop boots but external display not activated Status in linux-signed package in Ubuntu: New Bug description: upgrade from 22.10 to 23.04 went smoothly on my Dell laptop. I have an external monitor that on a dock. It works fine in 22.10 but won't activate properly with 23.04. If I boot with laptop lid closed I get the grub screen and then, once it boots, neither screen works. Reverting the kernel back to 5.19.0-40-generic does work as expected, but the new kernel with 6.2.0-20-generic does not, To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/2017364/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
