screen resolution won't lower after full screen with firefox

[Jack67]

Binary package hint: xorg

When ever i 'm in 1280 X 720 (HDMI) resolution, and use Firefox, everything is fine, i can go full screen (f11), close firefox (when in full screen) and then change resolution to a higher resolution(1680 x 1080), everything is fine, but if i'm in high resolution 1680x1080 and go full screen (f11) or expend the window (little square top right corner) and close Firefox like that(using the X) then even if i reboot or do a reconfigure of the X server, it's impossible to get back to 1280x720.

To regain lower resolution i have to open Firefox, go full screen (F11), click on the square in top right corner and resize the window small enough to use only 25% of the screen, then close Firefox, and then i can change the resolution. and everything is fine.

Note: I do not get any error message when changing the resolution, it simply goes black and then comes back to what ever it was asking if i want to keep resolution.

logistic:
1280 x 720 > Firefox full screen > close or change resolution to > 1680 x 1080 = O.K.
1680 x 1080 > Firefox full screen > close and/or change resolution to 1280 x 720 =BAD, reboot, system reconfigure x server stuck in 1680 x 1080

1680 x 1080 > Firefox full screen > resize window to 1/4 screen > close and/or change resolution to 1280 x 720 = O.K.

 lsb_release -rd
Description: Ubuntu 8.04.2
Release: 8.04

 apt-cache policy firefox
firefox:
  Installed: 3.0.10+nobinonly-0ubuntu0.8.04.1
  Candidate: 3.0.10+nobinonly-0ubuntu0.8.04.1
  Version table:
 *** 3.0.10+nobinonly-0ubuntu0.8.04.1 0
        500 http://archive.ubuntu.com hardy-updates/main Packages
        500 http://archive.ubuntu.com hardy-security/main Packages
        100 /var/lib/dpkg/status
     3.0~b5+nobinonly-0ubuntu3 0
        500 http://archive.ubuntu.com hardy/main Packages

ProblemType: Bug
Architecture: i386
Date: Thu May 7 18:41:42 2009
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/bin/yelp
NonfreeKernelModules: nvidia
Package: yelp 2.22.1-0ubuntu2.8.04.3
PackageArchitecture: i386
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: yelp
Uname: Linux 2.6.24-24-generic i686

[Bryce Harrington (bryce)]

Please attach the output of `lspci -vvnn`, and attach your /var/log/Xorg.0.log file from after reproducing this issue. If you've made any customizations to your /etc/X11/xorg.conf please attach that as well.

[Bryce Harrington (bryce)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.