I would have some additional comments.
I downloaded some new and old Ubuntu CD images, burned them, booted the
computer with the CDs, suspended it and finally resumed it. The
interesting result is that this issue is also presented in Ubuntu 10.10
Maverick but not presented in Ubuntu 9.10 Karmic Koala.
In 9.10, after resume, the screen has the same nice shading than before.
The CD image I used is ubuntu-9.10-desktop-amd64.iso.
The related parameters of this ubuntu release (on the CD):
uname -a
Linux ubuntu 2.6.31-14-generic #48-Ubuntu SMP Fri Oct 16 14:05:01 UTC 2009
x86_64 GNU/Linux
X -version
X.Org X Server 1.6.4
Release Date: 2009-9-27
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.24-23-server x86_64 Ubuntu
Current Operating System: Linux ubuntu 2.6.31-14-generic #48-Ubuntu SMP Fri Oct
16 14:05:01 UTC 2009 x86_64
Kernel command line: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed
boot=casper initrd=/casper/initrd.lz quiet splash --
Build Date: 26 October 2009 05:19:56PM
xorg-server 2:1.6.4-2ubuntu4 (buildd@)
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
--
Color depth degradation after resume (ATI Mobility Radeon X700)
https://bugs.launchpad.net/bugs/510001
You received this bug notification because you are a member of Ubuntu-X,
which is the registrant for xserver-xorg-driver-ati.
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