GNOME Bugzilla – Bug 651130
Window switcher appears stretched in multi-monitor setup
Last modified: 2012-02-23 18:53:08 UTC
My Dell E6410 laptop (intel integrated graphics) is connected to an external monitor (1280 x 1024). I use both the laptop screen (1280 x 800) and the external monitor. Now, when pressing Alt+` to switch between currently open windows, the window switcher (shown on the laptop monitor) is vertically stretched and partially falls off the screen. The Alt+Tab application switcher itself is shown correctly, it's just the window switcher for apps with multiple windows that gives the problem.
Can we have a screenshot? Thanks.
Created attachment 188863 [details] Photo of bug I hope this photo is clear enough, hitting Print Screen doesn't work while holding Alt.
Looks like a driver problem to me. What kind of system is this? What's your mesa driver version?
(In reply to comment #3) > Looks like a driver problem to me. What kind of system is this? What's your > mesa driver version? I'm running unmodified Fedora 15. As mentioned above, it's a Dell E6410 with integrated intel HD graphics.
I can confirm this on a Lenovo T420 (also with HD), but only when the screens are vertically oriented.
any news for this report?
(In reply to comment #6) > any news for this report? Is the given information not enough to remove the NEEDINFO status?
A seemingly related downstream bug: https://bugzilla.redhat.com/show_bug.cgi?id=684040
To reproduce, make the smaller display primary and you'll get broken scaling in alt+` window switcher. Thanks,
*** Bug 667863 has been marked as a duplicate of this bug. ***
Seeing this with dual displays, smaller one being the primary and Intel HW (i915). Please take a look at the screenshot in bug 667863 -- I think the specific glitches visible (one thumbnail is not stretched while others are) point to this possibly not being a graphics driver bug.
This bug is reproducable in gnome-shell 3.2.1 by the way, I just can't change the version field.
On this screenshot, you can see that the first thumbnail is compelte garbage, that the second is weird, and the third only slightly wrong. ;-) Seriously, that's a driver bug, and if it wasn't everybody would see the same problem. Please report it to driver developers, luckily you're using a free driver. https://bugs.freedesktop.org/enter_bug.cgi?product=xorg
Filed upstream bug https://bugs.freedesktop.org/show_bug.cgi?id=45661
Upstream closed their bug again, saying it's the problem of gnome-shell. :(
For reference, Chris Wilson's reply to Jasper was: > My observation was based on that g-s did not know the extents of the displays > within the framebuffer, or at least drew the monitor labels on the wrong > monitor and drew a fullscreen application that was on the second monitor split > across both monitors with a gap at the top.
*** Bug 670622 has been marked as a duplicate of this bug. ***
Created attachment 208295 [details] [review] altTab: Fix thumbnail size calculation for some dual-head setups The old formula worked only when the primary monitor was positioned at the top of the virtual desktop. When that was not the case, the available space was miscalculated sometimes resulting in negative numbers, which in the end produced strangely vertically stretched window thumbnails.
Attachment 208295 [details] pushed as 00ed297 - altTab: Fix thumbnail size calculation for some dual-head setups Pushed, thanks for the patch.