Public bug reported:
After upgrading from Ubuntu 14.04 to 16.04, the screen will stay black
after GRUB (backlight is on) when booting with the new 4.4 kernel
(linux-image-4.4.0-57-generic). Booting with the old 3.14 kernel will
make the screen work again.
This is on a BIOSTAR A780L mainboard, with the monitor connected via
DVI.
"ubuntu-bug linux" tells me that I appear to run a mainline kernel and
cannot report anything (obviously, as the screen doesn't work if I boot
the 16.04 kernel).
$ cat /proc/version_signature > version.log
cat: /proc/version_signature: No such file or directory
1) The release of Ubuntu you are using, via 'lsb_release -rd' or System
-> About Ubuntu
$ lsb_release -rd
Description: Ubuntu 16.04.1 LTS
Release: 16.04
2) The version of the package you are using, via 'apt-cache policy
pkgname' or by checking in Software Center
$ apt-cache policy linux-image-4.4.0-57-generic
linux-image-4.4.0-57-generic:
Installed: 4.4.0-57.78
Candidate: 4.4.0-57.78
Version table:
*** 4.4.0-57.78 500
500 http://de.archive.ubuntu.com/ubuntu xenial-updates/main amd64
Packages
500 http://security.ubuntu.com/ubuntu xenial-security/main amd64
Packages
100 /var/lib/dpkg/status
3) What you expected to happen
Screen doesn't stay black
4) What happened instead
Screen stays black
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "lspci-vnvn.log"
https://bugs.launchpad.net/bugs/1651910/+attachment/4794998/+files/lspci-vnvn.log
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https://bugs.launchpad.net/bugs/1651910
Title:
radeon: black screen after upgrade from 14.04 to 16.04 on RS780
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