ubuntu-x-swat team mailing list archive

[Bruno Girin <brunogirin@xxxxxxxxx>]

Public bug reported:

Binary package hint: xorg

Following an update a few days ago, my laptop's screen is detected as
having a 16:9 ratio rather than a 4:3 ratio and the display is set to
1360x768 pixels rather than 1024x768. As a result, the GDM login box is
shifted to the right and, once logged in, the screen extends to the
right making some elements of the desktop displayed outside the physical
screen area. This can be corrected on a per-user basis by setting the
resolution manually in System → Preferences → Monitors but doesn't
correct the login screen. See the attached photograph for an
illustration.

Steps to reproduce:
1. Boot Ubuntu 10.10 on a computer with a screen that has a physical 4:3 ratio (1024x768 in my case).
2. The boot screen is displayed with a 4:3 ratio
3. The login screen appears and is displayed with a resolution of 1360x768 pixels (16:9 ratio, login box shifted to the right)
4. Log-in
5. The desktop is displayed with a resolution of 1360x768 pixels resulting in 336 pixels (1360-1024) worth of screen real estate displayed outside the screen boundary to the right

Expected behaviour:
In steps 3 and 5, the login screen and the desktop should be displayed with resolution that has a 4:3 ratio, as per the physical ratio of the screen.

Workaround:
Once logged in, go to System → Preferences → Monitors and select a resolution that fits the physical screen. However, this needs to be done for every user on the system.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: xorg 1:7.5+6ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-22.32-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
Architecture: i386
DRM.card0.DVI.D.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1024x768 800x600 848x480 720x480 640x480
 edid-base64:
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
Date: Fri Sep 17 19:01:11 2010
DkmsStatus:
 virtualbox-ose, 3.2.8, 2.6.35-22-generic, i686: installed 
 virtualbox-ose, 3.2.8, 2.6.35-21-generic, i686: installed 
 virtualbox-ose, 3.2.8, 2.6.35-20-generic, i686: installed
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta i386 (20100406.1)
Lsusb:
 Bus 004 Device 002: ID 0483:2016 SGS Thomson Microelectronics Fingerprint Reader
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 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: IBM 2373F2G
PccardctlIdent:
 Socket 0:
   no product info available
 Socket 1:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
 Socket 1:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic root=UUID=c86343a6-8c93-482f-8875-d61d789d323e ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: xorg
dmi.bios.date: 06/18/2007
dmi.bios.vendor: IBM
dmi.bios.version: 1RETDRWW (3.23 )
dmi.board.name: 2373F2G
dmi.board.vendor: IBM
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: IBM
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnIBM:bvr1RETDRWW(3.23):bd06/18/2007:svnIBM:pn2373F2G:pvrThinkPadT42:rvnIBM:rn2373F2G:rvrNotAvailable:cvnIBM:ct10:cvrNotAvailable:
dmi.product.name: 2373F2G
dmi.product.version: ThinkPad T42
dmi.sys.vendor: IBM
glxinfo: Error: [Errno 2] No such file or directory
system:
 distro:             Ubuntu
 codename:           maverick
 architecture:       i686
 kernel:             2.6.35-22-generic

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 maverick

-- 
Screen with 4:3 ratio incorrectly detected as having 16:9 ratio
https://bugs.launchpad.net/bugs/641525
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