Please:
1. Run 'apport-collect 1780449' to send us more information about the
machine.
2. Take a photo of the corruption and attach it here.
** Tags added: regression-update xenial
** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu)
** Also affects: mesa (Ubuntu)
Importance: Undecided
Status: New
** Summary changed:
- Dual monitor system unusable after xorg+mesa upgrade
+ [regression] Graphics corruption after recent xenial updates
** Changed in: mesa (Ubuntu)
Status: New => Incomplete
** Changed in: xorg-server (Ubuntu)
Status: New => Incomplete
** Summary changed:
- [regression] Graphics corruption after recent xenial updates
+ [regression] i965 graphics corruption after recent xenial updates
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Packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1780449
Title:
[regression] i965 graphics corruption after recent xenial updates
Status in mesa package in Ubuntu:
Incomplete
Status in xorg-server package in Ubuntu:
Incomplete
Bug description:
I am using Ubuntu 16.04.4 LTS. Since the original release two years
ago it was working absolutely fine on a variety of machines. Now, on
this particular machine I have two monitors:
1. Dell 24" 1200x1920 (portrait) connected via D-SUB/VGA port
2. AOC 28" 1920x1080 (landscape) connected via DVI-D
I have made an upgrade today and the following packages were upgraded:
https://paste.ubuntu.com/p/5cf8hq6JQK/
Note that the list includes mesa libraries and xserver-xorg* packages
which are most suspect.
Here is my /var/log/Xorg.0.log:
https://paste.ubuntu.com/p/tB6yGhDT2S/
Here is the output of "sudo lspci -vvx":
https://paste.ubuntu.com/p/VVctSFwFSm/
As you can see, there is nothing special about this machine: a pretty
vanilla desktop with i5-3570K cpus (NOT overclocked!) and 16GB RAM.
Oh, I forgot to say what actually happens and why the system is
unusable: even if I create a single gnome-terminal window (say on the
Dell monitor) after a couple of seconds (of typing in the terminal)
large size rectangles appear on the other monitor. And if I start
Chrome (on a monitor different from the one gnome-terminal is running
on) then bits of the terminal sometimes appear on one of Chrome's tabs
and vice versa, i.e. bits (rectangular shape) of Chrome's tabs appear
on the terminal. Sometimes the content of the terminal gets corrupted.
And all this happens reasonably quickly (on the order of 5-10
seconds), which means you can't do any work at all. Also, creating
other windows (I started pavucontrol in the background) makes the mess
even worse, i.e. they all keep overwriting each other's rendering
context.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1780449/+subscriptions
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