Further investigation: Affects: 1) 5.13.19 does not suffer from this bug 2) The Ubuntu 5.15 kernels, and mainline 5.16 and 5.17 kernels *do* suffer from this bug.
Also of note: this only occurs the *first* time KMS tries to come up on the panel, and *only* if there is not a second monitor plugged in. Having a second monitor plugged in at boot results in a successful boot, *plugging in* a second monitor after triggering this bug results in *both* displays working fine, and *removing* a second monitor leaves the laptop panel working. It looks like maybe a bug has been introduced in framebuffer allocation? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1958620 Title: Flickering white/black screen once KMS comes up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958620/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
