Hi, This might be a gnome issue, I'm not sure... I have a dual head setup using Nvidia proprietary driver and twinview mode. My screens doesn't have the same size. When I move the mouse on the smallest one I can go into non visible region with the cursor. It makes cliking on the panel Icon harder because the mouse can go after. I don't have this problem when I used to be using xinerama. My desktop Icons on the smallest screen are also in non visible are.
I've got the same issue, and it's absolutely amazingly irritating. I use two 1600x1200 monitors now (I used to use two with different resolution). But sometimes I want to rotate one monitor (making it 1600x1200). I then have a rather huge area of 1600x400 that is practically useless, but as Adrien reported, downloaded files (desktop icons) can be there, and the mouse is trapped. Also, as reported, panel usage gets near impossible. I'm using the -ati driver, but have tried a lot of others. The bug seems to be xserver/randr related. Anyway, it's been like this for a long time (as long as I can remember), and there's not even a comment from the developers? Seriously, does this have such a low priority? Can it even be difficult to fix? I very much doubt that. I vote for a change from 'normal' severity to 'major'. This is the most frustrating issue in X I know of (crashes, cursor corruption etc etc is nothing compared to this). Please pick this up and fix it, or tell me which source code files probably are related to this and I will give it a serious try myself.
I have to agree this is a pretty serious problem that causes a lot of problems with modern desktop environments. This bug is over 3 years old, it definitely needs to be moved up to a higher priority.
See also bug 20334. (dupe?)
*** This bug has been marked as a duplicate of bug 20334 ***
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.