I'm running 15.10. Yesterday I had a message that there were updates available and I upgraded. Among the updates was kernel 4.2.0-30-generic. It wanted to restart but I chose restart later. This morning when I turned on the machine I went through the grub menu normally (Windows is also installed) and it booted to a black screen and stopped before the splash screen and login. From the black screen I can't CTRLALTF1 or do anything really and there is no disk activity. From looking at syslog
, it seems that the system time was wrong, but other than that, everything seems to have loaded properly, it just never got to the login screen. I restarted after a while and went through the grub menu to recovery mode and ran some of the diagnostics which didn't find anything except the system time. I let it continue with normal boot and it booted fine. Once logged in, I ran apt-get update/upgrade/autoremove/dist-upgrade/clean
and rebooted. Tried the default option and it booted to the same black screen. Tried kernel 4.2.0-30 (upstart) which froze. Tried 4.2.0-27-generic which boots no problem. I tried to run grub-script-check -v
from the terminal but it didn't do anything and I eventually had to ^C
. I've never tried to run it before but I would imagine that it shouldn't take too long. The man page said it just checks the config file for syntax. What do I do? Uninstall/Reinstall kernel 4.2.0-30?
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1Uninstall 4.2.0-30 and boot with 4.2.0-27. It is a bug.– Pilot6Feb 24, 2016 at 13:28
2 Answers
Kernel 4.2.0-30 has a bug. Uninstall it by issuing the following commands in the terminal.
sudo apt-get remove linux-image-4.2.0-30-generic
sudo update-grub2
It seems the Linux Kernel version 4.2.0-30 has a bug and is currently being fixed. See this: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1548587
A temporary solution (until the bug is fixed) was to remove the version 4.2.0-30 kernel. This should revert you back to whatever the last version that was working. The command below worked for me:
apt-get --purge remove linux-image-4.2.0-30-generic linux-image-extra-4.2.0-30-generic
For reference, both versions 4.2.0.27 and 4.2.0.25 worked for me without a problem