Public bug reported:
After upgrading to linux-image-4.15.0-44-generic via the update manager
today, I can't log in anymore. The login screen appears, but as soon as
I've entered my password and hit enter, the desktop locks up, keyboard
stops working and display goes black. Network is still working, so I
could login remotely and see the crash live via journalctl. I attached
the full output of journalctl -k -b -1
In short it says
BUG: unable to handle kernel NULL pointer dereference at 0000000000000245
IP: intel_ddi_post_disable+0x54/0x170 [i915]
PGD 0 P4D 0
Oops: 0000 [#1] SMP PTI
Infos about my hardware:
lsb_release -rd
Description: Ubuntu 18.04.1 LTS
Release: 18.04
apt-cache policy linux-image-4.15.0-44-generic
linux-image-4.15.0-44-generic:
Installiert: 4.15.0-44.47
Installationskandidat: 4.15.0-44.47
Versionstabelle:
*** 4.15.0-44.47 500
500 http://de.archive.ubuntu.com/ubuntu bionic-updates/main amd64
Packages
500 http://security.ubuntu.com/ubuntu bionic-security/main amd64
Packages
100 /var/lib/dpkg/status
Rebooting to the previous kernel 4.15.0-43 doesn't have this issue and I
can login without issues.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: bionic kernel-bug
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https://bugs.launchpad.net/bugs/1813796
Title:
kernel bug null pointer dereference
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