Philippe Clérié, while utilizing the WORKAROUND, please execute the following command only once, as it will automatically gather debugging information, in a terminal: apport-collect 1568211
** Summary changed: - no UMS support in radeon module + Unable to boot ** Tags added: regression-release xenial ** Description changed: I upgraded overnight from Wily to Xenial. The system will not boot. Only a blank screen after grub loads the kernel. The recovery kernel loads fine and I was able to find the following messages: [drm] VGACON disable radeon kernel modesetting [drm:radeon_init [radeon]] *ERROR* no UMS support in radeon module! The recovery kernel command line had a nomodeset parameter that was not in the main kernel command line. - Adding the nomodeset parameter the main kernel command line finally - booted the system. It's kind of ugly but it seems to work. - Note: For what it's worth I reported a similar issue against several Utopic kernels (bug #1407505). There was a back and forth with jsalisbury until a kernel finally worked. I have had no problems until today. - Hope that helps. + WORKAROUND: Adding the nomodeset parameter the main kernel command line + finally booted the system. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1568211 Title: Unable to boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1568211/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
