Position of second monitor wrong in dual monitor setup if first monitor is 1366x768
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
xserver-xorg-driver-ati |
Fix Released
|
Unknown
|
|||
xserver-xorg-video-ati (Ubuntu) |
Incomplete
|
Low
|
Unassigned |
Bug Description
Binary package hint: xorg
I'm using a two-monitor setup with an ati graphics card (Mobility Radeon HD 4300) on my laptop(lenovo u450p).
The Laptop screen has a hardware resolution of 1366x768, the external monitor a hardware resolution of 1920x1080.
If I set up the second monitor using
xrandr --output HDMI-0 --off
xrandr --output LVDS --auto
xrandr --output HDMI-0 --auto --right-of LVDS
(or the kde gui, the effects are equal)
I expect
1) the left 1366x768 area to be on the laptop screen, and
2) the right 1920x768 area to be on the big monitor.
But I observe:
1) happens as expected
2) happens almost. instead, the 2 rightmost pixels on the laptop monitor are repeated on the left border of the big monitor(filled with black to the bottom), in turn the two rightmost columns of the virtual display area are not visible on any monitor at all.
If I switch the laptop monitor resolution to 1280x720, this effect does not occur, and - except for the then blurred laptop screen - everything works as expected.
A screenshot shows the whole virtual desktop correctly.
Ubuntu version: 10.10 (maverick)
graphics card:
01:00.0 VGA compatible controller: ATI Technologies Inc M92 LP [Mobility Radeon HD 4300 Series]
xorg version: 1:7.5+6ubuntu3
I'm using the 'radeon' display driver, as detected by default. fglrx is not installed.
using kde 4.5.3
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: xorg 1:7.5+6ubuntu3
ProcVersionSign
Uname: Linux 2.6.35-22-generic x86_64
Architecture: amd64
DRM.card0.
status: connected
enabled: enabled
dpms: On
modes: 1920x1080 1920x1080 1600x1200 1680x1050 1400x1050 1280x1024 1280x1024 1440x900 1280x960 1152x864 1280x720 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 800x600 720x480 640x480 640x480 640x480 640x480 720x400
edid-base64: AP/////
DRM.card0.LVDS.1:
status: connected
enabled: enabled
dpms: On
modes: 1366x768 1366x768 1280x720 1152x768 1024x768 800x600 848x480 720x480 640x480
edid-base64: AP/////
DRM.card0.VGA.1:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
Date: Tue Nov 23 20:11:52 2010
InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Release Candidate amd64 (20100928.3)
MachineType: LENOVO 3389
ProcCmdLine: BOOT_IMAGE=
ProcEnviron:
LANGUAGE=
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: xorg
dmi.bios.date: 01/20/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 22CN35WW(V2.02)
dmi.board.name: NITU1
dmi.board.vendor: LENOVO
dmi.board.version: REFERENCE
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: No Enclosure
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 3389
dmi.product.
dmi.sys.vendor: LENOVO
peripherals:
system:
distro: Ubuntu
codename: maverick
architecture: x86_64
kernel: 2.6.35-22-generic
---
Architecture: amd64
CompizPlugins: No value set for `/apps/
CompositorRunning: kwin
DRM.card0.HDMI.A.1:
status: connected
enabled: enabled
dpms: On
modes: 1920x1080 1600x1200 1680x1050 1400x1050 1280x1024 1280x1024 1440x900 1280x960 1152x864 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 800x600 640x480 640x480 640x480 640x480 720x400
edid-base64: AP/////
DRM.card0.LVDS.1:
status: connected
enabled: enabled
dpms: On
modes: 1366x768 1366x768 1280x720 1152x768 1024x768 800x600 848x480 720x480 640x480
edid-base64: AP/////
DRM.card0.VGA.1:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DistUpgraded: Fresh install
DistroCodename: natty
DistroRelease: Ubuntu 11.04
DistroVariant: kubuntu
DkmsStatus: bcmwl, 5.100.82.38+bdcom, 2.6.38-8-generic, x86_64: installed
GraphicsCard:
ATI Technologies Inc M92 LP [Mobility Radeon HD 4300 Series] [1002:9552] (prog-if 00 [VGA controller])
Subsystem: Lenovo Device [17aa:3903]
InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110301.4)
MachineType: LENOVO 3389
NonfreeKernelMo
Package: xserver-
PackageArchitec
ProcEnviron:
LANGUAGE=en_DK
PATH=(custom, user)
LANG=en_DK.UTF-8
LC_MESSAGES=
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
ProcVersionSign
Renderer: Unknown
Tags: natty kubuntu patch
Uname: Linux 2.6.38-8-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 01/20/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 22CN35WW(V2.02)
dmi.board.name: NITU1
dmi.board.vendor: LENOVO
dmi.board.version: REFERENCE
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: No Enclosure
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 3389
dmi.product.
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.ia32-libs: ia32-libs 20090808ubuntu13
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.
version.
version.
version.
version.
version.
version.
affects: | xorg (Ubuntu) → xserver-xorg-video-ati (Ubuntu) |
tags: | added: kubuntu |
Changed in xserver-xorg-video-ati (Ubuntu): | |
status: | Expired → New |
Changed in xserver-xorg-driver-ati: | |
importance: | Unknown → Medium |
status: | Unknown → Invalid |
Changed in xserver-xorg-video-ati (Ubuntu): | |
status: | Incomplete → Fix Released |
Changed in xserver-xorg-video-ati (Ubuntu): | |
status: | Fix Released → Incomplete |
Changed in xserver-xorg-driver-ati: | |
importance: | Medium → Unknown |
status: | Invalid → Fix Released |
This bug appears to be the same as #666058 and #472716. But it is described here more precisely. The reason for the problem is a wrong selection of the area of the extended desktop for the second screen.
I experience the same problem using a 1366x768 screen and 1280x1024 in dual view mode. It happens both with deactivated and activated fglrx driver. As reported by Andreas Gölzer the effect vanishes as soon as "a more common resolution" is chosen instead of the 1366x768. Anyway, it probably affects a lot of users using their laptop together with an external screen.
Does anyone know a possibility to configure the position of the shown area of the extended desktop for each screen?
Best regards,
Christian