Comment 59 for bug 642792

I've always used RightAlt+PrtScr in Ubuntu and Windows to take a
snapshot of the active window.
I'm still using Lucid (partly because of this bug as I often take
snapshots for instructional purposes) and both LeftAlt+PrtScr and
RightAlt+PrtScr take snapshot the active window.

On 24 February 2011 19:31, Miroslav <email address hidden> wrote:
> My understanding of Alt+PrtScr/SysRq was always like that:
>
> LeftAlt+PrtScr/SysRq produces screenshot of active window
>
> RightAlt+PrtScr/SysRq produces SysRq event
>
> On some keyboards RightAlt is labeled as "Alt Gr".
>
> In Ubuntu 10.10 LeftAlt+PrtScr/SysRq produces SysRq
> and I think that's wrong.
>
> --
> You received this bug notification because you are a direct subscriber
> of the bug.
> https://bugs.launchpad.net/bugs/642792
>
> Title:
>  ALT+PrtSc not recognised: breaks built-in screenshot function
>
> Status in Release Notes for Ubuntu:
>  New
> Status in “compiz” package in Ubuntu:
>  Invalid
> Status in “linux” package in Ubuntu:
>  Confirmed
> Status in “metacity” package in Ubuntu:
>  Invalid
> Status in “compiz” source package in Maverick:
>  Invalid
> Status in “linux” source package in Maverick:
>  New
> Status in “metacity” source package in Maverick:
>  Invalid
>
> Bug description:
>  Binary package hint: xkeyboard-config
>
>  On an EN-GB keyboard (and maybe others) ALT+PrtSc is the default
>  keyboard shortcut for "Take a screenshot of a window" as configured in
>  System -> Preferences -> Keyboard Shortcuts. However the system
>  doesn't seem to respond to that keyboard combination at all. Pressing
>  ALT+PrtSc on a default Maverick install does nothing. Indeed
>  attempting to _set_ that keyboard shortcut in the Keyboard Shortcuts
>  dialog results in it not being registered.
>
>  Workaround:
>  sudo sysctl -w kernel.sysrq=0
>
>  Steps to reproduce:-
>
>  1) Try to screenshot the entire desktop with PrtSc - this works
>  2) Try to take a screenshot of one active window with ALT+PrtSc - nothing happens.
>
>  Additionally
>
>  1) Navigate to System -> Preferences -> Keyboard Shortcuts
>  2) Scroll down to Desktop -> Take a screenshot of a window, and then click that line in order to set a keyboard shortcut for the action
>  3) Press ALT+PrtSc - nothing happens
>  4) Press a different keyboard combination such as CTRL+PrtSc or Super/Windows+PrtSc - this works
>
>  Additionally
>
>  1) Open a terminal
>  2) Run 'xev' and then press ALT+PrtSc. Observe data in the xev terminal window when ALT is pressed, but nothing for ALT+PrtSc
>
>  Seems a fairly critical regression bug given we document this keyboard
>  shortcut in the help, and it's very commonly used by documenters and
>  people getting support. It works fine in previous releases.
>
>  ProblemType: Bug
>  DistroRelease: Ubuntu 10.10
>  Package: xkb-data 1.8-1ubuntu8
>  ProcVersionSignature: Ubuntu 2.6.35-22.32-generic 2.6.35.4
>  Uname: Linux 2.6.35-22-generic x86_64
>  NonfreeKernelModules: nvidia
>  .proc.driver.nvidia.version:
>   NVRM version: NVIDIA UNIX x86_64 Kernel Module  256.53  Fri Aug 27 20:27:48 PDT 2010
>   GCC version:  gcc version 4.4.5 (Ubuntu/Linaro 4.4.4-14ubuntu4)
>  Architecture: amd64
>  CurrentDmesg:
>   [   22.090007] eth1: no IPv6 routers present
>   [  691.401253] show_signal_msg: 9 callbacks suppressed
>   [  691.401258] gnome-help[2307]: segfault at 35a3f08 ip 00007f9f58d3043e sp 00007ffffd377130 error 4 in libxml2.so.2.7.7[7f9f58cae000+147000]
>  Date: Sun Sep 19 14:19:15 2010
>  Dependencies:
>
>  DkmsStatus:
>   nvidia-current, 256.53, 2.6.35-22-generic, x86_64: installed
>   nvidia-current, 256.53, 2.6.35-21-generic, x86_64: installed
>   nvidia-current, 256.53, 2.6.35-20-generic, x86_64: installed
>  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
>  MachineType: System manufacturer System Product Name
>  PackageArchitecture: all
>  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic root=UUID=fb22b4e1-1576-4bf8-8272-15300bc7de38 ro quiet splash
>  ProcEnviron:
>   LANG=en_GB.utf8
>   SHELL=/bin/bash
>  SourcePackage: xkeyboard-config
>  dmi.bios.date: 04/24/2009
>  dmi.bios.vendor: Phoenix Technologies, LTD
>  dmi.bios.version: ASUS P5N32-E SLI ACPI BIOS Revision 1801
>  dmi.board.name: P5N32-E SLI
>  dmi.board.vendor: ASUSTeK Computer INC.
>  dmi.board.version: 1.XX
>  dmi.chassis.asset.tag: 123456789000
>  dmi.chassis.type: 3
>  dmi.chassis.vendor: Chassis Manufacture
>  dmi.chassis.version: Chassis Version
>  dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrASUSP5N32-ESLIACPIBIOSRevision1801:bd04/24/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5N32-ESLI:rvr1.XX:cvnChassisManufacture:ct3:cvrChassisVersion:
>  dmi.product.name: System Product Name
>  dmi.product.version: System Version
>  dmi.sys.vendor: System manufacturer
>  glxinfo: Error: [Errno 2] No such file or directory
>  system:
>   distro:             Ubuntu
>   codename:           maverick
>   architecture:       x86_64
>   kernel:             2.6.35-22-generic
>
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>