> This confirms the regression is not a hardware, kernel, or Mesa/mutter driver defect — the exact same graphics stack works fine from a clean image.
Incorrect because the kernel has received updates since 26.04 was released. So it might be a kernel regression. > 2026-07-04 to 2026-07-06 (an apt remove --purge of unrelated packages cascaded into removing/reinstalling gnome-shell, gdm3, ubuntu-desktop, and ~200+ other packages). Yes it sounds like user error, although we won't close the bug immediately because we'd like the problem to be harder to trigger in future. > Happy to dig into anything specific if there's a good way to diff the live image's state against this installation That's a good idea, I've used it before. Try running: dpkg -l > packages.txt in both the live session and install, then diff the two files. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2160652 Title: gnome-shell/mutter 50.1 fails to start on Intel Alder Lake iGPU: gbm_create_device() returns EINVAL ("Failed to open gpu ... No GPUs found" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2160652/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
