From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
Subject: [Bug 100760] New: Rapid flickering when an app is placed
on the second Nouveau ZaphodHeads display
Date: Sat, 22 Apr 2017 22:39:02 +0000
Message-ID:
Bug ID
100760
Summary
Rapid flickering when an app is placed on the second Nouveau =
ZaphodHeads display
Product
xorg
Version
unspecified
Hardware
x86-64 (AMD64)
OS
Linux (All)
Status
NEW
Severity
major
Priority
medium
Component
Driver/nouveau
Assignee
nouveau@lists.freedesktop.org
Reporter
mrj@advancedcontrols.com.au
QA Contact
xorg-team@lists.x.org
For many years I've configured my second monitor as a separate=
X display
because this allows the monitors to have an independent sets of virtual
desktops. With five virtual desktops on each monitor, I could select and
display 25 combinations instead of the five with Xinerama.
This worked fine with the "separate X displays" mode of the propr=
ietary Nvidia
driver. But eventually the second display couldn't display a background ima=
ge
(black only). Later, apps started from a panel or terminal on the second
display would come up on the first unless I set the DISPLAY variable to :0.=
1 on
the command lines of both launchers and terminal commands. I could live with
both of these problems.
When the proprietary Nvidia driver no longer supported my graphics card in =
the
latest X, I moved to Nouveau, using the ZaphodHeads option to get the
equivalent of the "separate X displays" mode. This worked, though=
I still had
the same problems with getting stuff to appear on the second display.
This was with Fedora 23. I've just upgraded to Fedora 25, and although the
second X monitor and display still comes up (black only, but a pointer can =
be
moved around it), nothing can be placed on it. If I run "DISPLAY=3D:0.1
mate-terminal" on the first display, the terminal does appear on the s=
econd,
but there is a rapid flickering of both displays, sometimes ending in a mac=
hine
crash, and the new terminal cannot be used. This happens with both Mate and
Gnome 3.
Xinerama mode (empty xorg.conf) works fine, though of course I've now got o=
nly
five instead of 25 virtual desktop combinations.
The current Fedora 25 Nouveau version is xorg-x11-drv-nouveau.x86_64
1:1.0.14-2.fc25, and the Kernel version is 4.10.10-200.fc25.x86_64.
* Is this a Nouveau problem?
* Is this a known problem?
* Is this unlikely to be fixed because "Zaphod mode is a legacy featur=
e"
https://bugs.freedesktop.org/show_bu=
g.cgi?id=3D99103#c6 ?
* Is there another way to get dedicated sets of virtual desktops for each
monitor?