I have just had the same issue. Blank and frozen screen after booting in to 4.13.26 for the first time. The ubuntu colours are visible and the 16.04 logo also appears bottom left. The desktop was previously configured to run in 1920x1080. However, the screen changes to 4:3 ratio. No mouse or keys so unable to confirm the actual resolution. I assume it is a default. I followed another report before finding this one so deleted the .config directory. Ubuntu booted up to a desktop in default resolution. However, the screen then locked when changing the resolution. Ubuntu 16.04 desktop running inside KVM. So no special graphics installed to speak of. The image is encrypted with LVM inside the qcow file. Requires a password to boot after the grub menu. KVM hypervisor still running 4.10. Took a deep breath, rebooted and brought the hypervisor up on 4.13. Still the same issues. ssh on to the desktop machine continues to work fine even when the graphics are blank and frozen. Followed the workaround above, booted in to 4.10 via grub and everything springs back to life as expected. Able to put the desktop back to 1920x1080. Further reboots into 4.10 maintain that resolution.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1742602 Title: Blank screen when starting X after upgrading from 4.10 to 4.13.0-26 Status in linux package in Ubuntu: Confirmed Bug description: I'm following the HWE kernels in Ubuntu 16.04, so my kernel was upgraded today from 4.10.0-42 to 4.13.0-26. After rebooting, the splash screen and disk encryption passphrase prompt showed correctly, but when X started, the screen went blank. Logs showed everything running as normal despite the blank screen. Rebooting with the "nomodeset" kernel parameter fixed the issue but is not suitable as a permanent workaround since it disables my external monitor. Rebooting back into 4.10 also fixed the issue. I am using a ThinkPad X240 laptop, current HWE X.org packages. I tried both intel and fbdev X drivers, both gave a blank screen. lsb_release: Ubuntu 16.04.3 LTS dpkg-query -W: linux-signed-image-generic-hwe-16.04 4.13.0.26.46 xserver-xorg-hwe-16.04 1:7.7+16ubuntu3~16.04.1 xserver-xorg-video-intel-hwe-16.04 2:2.99.917+git20170309-0ubuntu1~16.04.1 xserver-xorg-video-fbdev-hwe-16.04 1:0.4.4-1build6~16.04.1 In Xorg.0.log with fbdev, I saw: [ 23.646] (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument repeated 239 times. Typical kernel messages attached (from kern.log, reformatted to look like dmesg). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1742602/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
