After install package from proposed, there is no longer segfault.
After set out-of-range display number it just displays:
xwininfo -root -display :0.1
xwininfo: error: unable to access screen 1, max is 0
Verification done.
** Changed in: x11-utils (Ubuntu Precise)
Assignee: (unassigned) => Bartosz Kosiorek (gang65)
** Tags removed: verification-needed
** Tags added: verification-done
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https://bugs.launchpad.net/bugs/1028274
Title:
xwininfo segfaults if given a non-existent screen with -display option
Status in X11 Utils:
Fix Released
Status in “x11-utils” package in Ubuntu:
Fix Released
Status in “x11-utils” source package in Precise:
Fix Committed
Status in “x11-utils” source package in Quantal:
Fix Released
Status in “x11-utils” package in Fedora:
Unknown
Bug description:
[Impact]
xwininfo segfaults if called with an out-of-range display number.
[Test Case]
1. xwininfo -root -display :0.0
2. xwininfo -root -display :0.1
Actual Behavior:
* First command passes
* Second command segfaults
Expected Behavior:
* First command passes
* Second command returns an error message without segfaulting
[Fix]
The proposed patch works as is and is proposed for both precise and quantal.
[Regression Potential]
The patch is small and only affects an error condition check, so the chance
of a regression seems very small. xwininfo is not widely used, so the impact
of a regression would be minimal as well.
[Original Report]
I have a dual-head setup that only presents one "screen" to X (subdivided by
xinerama).
If I run xwininfo -root -display :0.0 it works as expected, giving the root
window information for my single "screen".
If I run xwininfo -root -display :0.1 it segfaults.
I expect it to exit gracefully with an error message. On Ubuntu 8.04 this
error message used to be "cannot open display :0.1".
The problem could lie in libxcb (I'm no expert)
xcb_connection_has_error() no longer returning true in the -display
:0.1 case, but I've attached a patch for xwininfo anyway.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: x11-utils 7.6+4
ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21
Uname: Linux 3.2.0-27-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory:
'/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86_64 Kernel Module 295.49 Mon Apr 30 23:46:33
PDT 2012
GCC version: gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
.tmp.unity.support.test.0:
ApportVersion: 2.0.1-0ubuntu11
Architecture: amd64
CompizPlugins:
[core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: None
Date: Tue Jul 24 16:37:34 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
nvidia-current, 295.40, 3.2.0-23-generic, x86_64: installed
nvidia-current, 295.40, 3.2.0-26-generic, x86_64: installed
nvidia-current, 295.40, 3.2.0-27-generic, x86_64: installed
nvidia-current-updates, 295.49, 3.2.0-27-generic, x86_64: installed
GraphicsCard:
NVIDIA Corporation G98 [Quadro NVS 295] [10de:06fd] (rev a1) (prog-if 00
[VGA controller])
Subsystem: NVIDIA Corporation Device [10de:062e]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
JockeyStatus:
xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary,
Disabled, Not in use)
xorg:nvidia_current_updates - NVIDIA accelerated graphics driver
(post-release updates) (Proprietary, Enabled, In use)
MachineType: Dell Inc. Precision WorkStation T3500
ProcEnviron:
LANGUAGE=en_AU:en
TERM=xterm
PATH=(custom, user)
LANG=en_AU.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-27-generic
root=UUID=2769af30-df94-44f1-9846-7241763e2193 ro quiet splash vt.handoff=7
SourcePackage: x11-utils
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/12/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 09KPNV
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 7
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA07:bd04/12/2010:svnDellInc.:pnPrecisionWorkStationT3500:pvr:rvnDellInc.:rn09KPNV:rvrA00:cvnDellInc.:ct7:cvr:
dmi.product.name: Precision WorkStation T3500
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.7.8-0ubuntu1.2
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1.2
version.xserver-xorg-video-ati: xserver-xorg-video-ati
1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:0.0.16+git20111201+b5534a1-1build2
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