GNOME Bugzilla – Bug 667032
Gnome Shell unresponsive to mouse when second monitor is attached
Last modified: 2017-04-22 19:53:57 UTC
My graphics card is an ATI Radeon X600Pro and I'm using the Gallium 0.4 driver and GNOME Shell on a fresh Ubuntu 11.10 install. When a second monitor is plugged in, GNOME Shell becomes unresponsive to most mouse actions (e.g. top bar and activities hot corner work rarely, dash doesn't work, dragging windows + workspace switching in overview is buggy if not impossible). There's no problem with the keyboard though. Also windows react as expected to mouse/keyboard input. When only one monitor is plugged in, everything works perfectly again. It may be worth mentioning that I had the Nvidia 173 and 195 drivers previously installed. I had to uninstall the old drivers to get 3D acceleration working properly. This bug has already been reported on the Red Hat Bugzilla with no response: https://bugzilla.redhat.com/show_bug.cgi?id=742090
Could you attach your ~/.xsession-errors after connecting the second monitor?
Created attachment 204432 [details] ~/.xsession-errors after fresh boot with both monitors connected, clicked once on activities button Sure, here's the log after booting with both monitors connected and clicking on the activities button. I think this is the useful part: (gnome-shell:1670): Clutter-WARNING **: The required ID of 4210752 does not refer to an existing actor; this usually implies that the pick() of an actor is not correctly implemented or that there is an error in the glReadPixels() implementation of the GL driver. After googling this line I've found several bug reports about similar problems but no actual solution. I will try to help in what ever way I can.
I'd be really happy to see this bug fixed. I really like GNOME Shell, but this way it becomes useless when it comes to working with it. Please let me know if i can provide any more information.
(In reply to comment #0) > My graphics card is an ATI Radeon X600Pro and I'm using the Gallium 0.4 driver > and GNOME Shell on a fresh Ubuntu 11.10 install. When a second monitor is > plugged in, GNOME Shell becomes unresponsive to most mouse actions (e.g. top > bar and activities hot corner work rarely, dash doesn't work, dragging windows > + workspace switching in overview is buggy if not impossible). There's no > problem with the keyboard though. Also windows react as expected to > mouse/keyboard input. > When only one monitor is plugged in, everything works perfectly again. It might be the 2048x2048 texture limit on this hardware. If the monitor is plugged in before you boot, does GDM log you in to gnome-shell?
Yes, this works flawlessly. Before the session is started, both monitors diplay the same content.
Can we close the bug ?
I don't see why; it hasn't been fixed yet. Again, I'd be really happy to provide more information.
I just had the same problem with my nvidia: ubuntu 12.04 upgraded from 11.10 Dual screen VGA compatible controller: NVIDIA Corporation G92 [GeForce 9800 GT] Gnome shell hangs randomly and the mouse is slow, no possible interaction with the computer, had to hard reboot.
Bumped to version 3.4.x, because bug is also seen in ubuntu 12.04 (last post), which delivers gnome 3.4 normally.
Reopening as the required information has been provided.
Is this still happening with a recent version of GNOME (3.24 would be preferred)?
I reported this bug 5 years ago now and I'm no longer using either the same graphics card or Gnome with a dual monitor setup. I'm sorry I can't provide any more information.
Fair enough. Sorry that we were unable to help with this. Please feel free to reopen this bug report if you ever run into it again.