Software Updater window not displaying, though open in 13.04

Solution 1:

I am having the same problem on my system.

Freshly installed Ubuntu 13.04 from scratch, no dual boot, no upgrade from previous version.

AMD video card, ATI Radeon HD 5700 - using ATI's Catalyst Drivers v 12.9

Multiple monitors, 2 1080p screens, one 1280x1024

to get around the issue when there are new updates that it automatically scans for, I right click the icon on the taskbar, quit the software, and then start it again from the unity menu manually and the window will show up.... so it's not that big of a pain there is a workaround....

but I have another Ubuntu 13.04 machine right next to me and that one does show this window.... ( that system was also freshly installed 13.04, but single monitor, AMD Radeon HD 7500, Catalyst 12.9 ).

I've also noticed on the system that isn't showing the window, no matter what virtual desktop I'm on, clicking the icon doesn't switch desktops to where the window would be located, so I imagine that means the window does not even exist ( if it was perhaps out of my viewscreen coordinates... ). Other windows that are present on other virtual desktops do what I expect when clicking their icon - they switch the virtual desktop to the one with the active window....

What other information could be pertinent to this issue?

maybe related/similar to:

https://bugs.launchpad.net/unity/+bug/1003950 https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1001067

Solution 2:

Same problem here, but the window is sometimes hidden, sometimes it is not. Unfortunately there is no obvious reason. One thing in common, I also have an AMD APU with onboard Radeon graphics (AMD Radeon HD7420G = HD7500M/7600M Series)

Also I can use the window if I start the Software Updater manually.