[Displays] Too easy to set a configuration where borders do not quite match

[Robin]

I have 2 monitors on the system. The samsung is working as it should. The video7 has the resolution set at 1280*1024 at 75Hz. The V7 mouse does not stop at the top of the screen even though that is where the window stops. Give me an email address and I will send you a screen shot. The right hand screen which is a samsung 1920*1080 has it boundary stop at the top of the physical screen. Not so with the V7.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic-pae 2.6.38.8
Uname: Linux 2.6.38-11-generic-pae i686
Architecture: i386
CompizPlugins: [core,composite,opengl,decor,cube,annotate,gears,fadedesktop,rotate,obs,regex,neg,mousepoll,vpswitch,showmouse,mag,commands,splash,firepaint,water,opacify,animation,animationaddon]
CompositorRunning: None
Date: Wed Sep 14 22:35:41 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
GraphicsCard:
 nVidia Corporation G73 [GeForce 7600 GS] [10de:0392] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: LeadTek Research Inc. Device [107d:2a52]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
MachineType: Gigabyte Technology Co., Ltd. EP35-DS3L
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic-pae root=UUID=b9146602-f837-4b0b-b788-61f50ef09dc0 ro quiet splash vt.handoff=7
Renderer: Software
SourcePackage: xserver-xorg-video-nouveau
UpgradeStatus: No upgrade log present (probably fresh install)
XorgConf:

dmi.bios.date: 04/02/2008
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F4
dmi.board.name: EP35-DS3L
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF4:bd04/02/2008:svnGigabyteTechnologyCo.,Ltd.:pnEP35-DS3L:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnEP35-DS3L:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: EP35-DS3L
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty2
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

[Chris Halse Rogers (raof)]

From your Xrandr info:
"""
…
DVI-I-2 connected 1280x1024+0+56 (0xa4) normal (normal left inverted right x axis y axis) 376mm x 301mm
…
"""

The 1280x1024 bit is the resolution it's using, and the +0+56 is the position the X server has been told to put it - which means the X server thinks its 56 pixels down from the top. That's where your mouse is ending up.

This doesn't appear to be a driver bug. Rather, it's a configuration issue. Try re-aligning the monitors in gnome-display-preferences - the snapping zone isn't very big, so it's quite easy to set up your displays not quite aligned like here.

[Chris Halse Rogers (raof)]

Moving to gnome-control-center. This isn't an X bug, but it is annoying that it's so easy to set up a configuration that you didn't intend.

[Sebastien Bacher (seb128)]

The bug description is not really a bug but indeed g-c-c could make it a bit harder to run into such configuration issues

[ijk (ijk)]

I can't recreate this in precise. Fixed?