Grey line is under my mouse

What's your graphic card?

ATI Mobility Radeon X1400 (128 MB)

I think I have the same problem with my radeon when using fglrx in Xorg but the kernel module is not correctly loaded.
Could you provide me the output of lsmod|grep fglrx

~$ lsmod | grep fglrx
fglrx 406988 0
agpgart 34888 2 fglrx,intel_agp

Same effect here. I've got an IBM T60 laptop equipped with ATI X1400.

Outputs:
:~$ lsmod | grep fglrx
fglrx 406988 0
agpgart 34888 2 fglrx,intel_agp

~$ dmesg | grep fglrx
[17179603.576000] fglrx: module license 'Proprietary. (C) 2002 - ATI Technologies, Starnberg, GERMANY' taints kernel.
[17179603.576000] [fglrx] Maximum main memory to use for locked dma buffers: 1898 MBytes.
[17179603.576000] [fglrx] module loaded - fglrx 8.28.8 [Aug 17 2006] on minor 0

The problem popped up when upgrading from Dapper with dist-upgrade. Now, I've made a clean install from the Edgy DVD, and the situation is exactly the same.

After looking into other problems I'm having, I found that this problem is related to fglrx. Apparently, the fglrx driver doesn't load properly.

fglrxinfo

Xlib: extension "XFree86-DRI" missing on display ":0.0".
display: :0.0 screen: 0
OpenGL vendor string: Mesa project: www.mesa3d.org
OpenGL renderer string: Mesa GLX Indirect
OpenGL version string: 1.2 (1.5 Mesa 6.5.1)

For what ever reason, the Mesa drivers are loaded. I've tried various fixes that I found on the forums (none worked). Also the ati drivers (the ones from there website - ati-driver-installer-8.29.6.run) gives me the following error when I try to install them:

sudo sh ./ati-driver-installer-8.29.6.run
Password:
Creating directory fglrx-install
Verifying archive integrity... All good.
Uncompressing ATI Proprietary Linux Driver-8.29.6............................................ .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................
-e ==================================================
-e ATI Technologies Linux Driver Installer/Packager
-e ==================================================
./ati-installer.sh: 176: Syntax error: Bad substitution
Removing temporary directory: fglrx-install

Adding:

Section "Extensions"
        Option "Composite" "Disable"
EndSection

:to my xorg.conf allows me to use the fglrx driver; however, when I type ctrl+alt+f1, I get a messed up screen (lots of lines and colors).

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