X Server ati/radeon driver resolution issue

[Barret Ruttan]

Binary package hint: xserver-xorg-video-ati

Not sure if this is a bug per se, but here goes.

If I switch to a resolution with a 4:3 aspect ratio(800 x 600, 640 x 480) I see a blank screen. However, this is not the case if I switch to 1024 x 768, which also uses a 4:3 aspect ratio:

lspci -nn | grep VGA
01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS482 [Radeon Xpress 200M] [1002:5975]

xrandr
Screen 0: minimum 320 x 200, current 1280 x 800, maximum 4096 x 4096
VGA-0 disconnected (normal left inverted right x axis y axis)
LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
   1280x800 60.0*+
   1280x720 59.9
   1152x768 59.8
   1024x768 59.9
   800x600 59.9
   848x480 59.7
   720x480 59.7
   640x480 59.4

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xorg 1:7.5+5ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
Architecture: i386
Date: Wed Jun 9 12:33:24 2010
DkmsStatus:
 virtualbox-ose, 3.1.6, 2.6.32-21-generic, i686: installed
 virtualbox-ose, 3.1.6, 2.6.32-22-generic, i686: installed
GdmLog2:

InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Release Candidate i386 (20100419.1)
Lsusb:
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 002: ID 09da:000e A4 Tech Co., Ltd
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Acer Aspire 5100
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=b5222432-a020-4280-8485-665afa9b1085 ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: xorg
Symptom: display
dmi.bios.date: 08/22/2008
dmi.bios.vendor: Acer
dmi.bios.version: V3.13
dmi.board.name: Navarro
dmi.board.vendor: Acer
dmi.board.version: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAcer:bvrV3.13:bd08/22/2008:svnAcer:pnAspire5100:pvrV3.13:rvnAcer:rnNavarro:rvrN/A:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 5100
dmi.product.version: V3.13
dmi.sys.vendor: Acer
glxinfo: Error: [Errno 2] No such file or directory
system:
 distro: Ubuntu
 codename: lucid
 architecture: i686
 kernel: 2.6.32-22-generic

[Illogic_Gate (illogicgate)]

This is a double report, the nearly identical report is here: https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/591830

Marking as a duplicate.