Hi everyone,

I experienced the following issue in two different environments (debian stable i386 and debian testing amd64).


Test case:

$ xwininfo -root -tree | grep 0x | awk '{print $1}' | xargs -n 1 xwd -out tmp.xwd -id
or
get the id first, then dump
$ xwininfo -root -tree | grep MyWindowName
$ xwd -id MyWindowId

Typical output from xwd:

X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  73 (X_GetImage)
  Serial number of failed request:  15
  Current serial number in output stream:  15

Note that when omitting -id and clicking the right window, the dump works fine.

Stable:
Linux 2.6.26-2-686 #1 SMP Wed Aug 19 06:06:52 UTC 2009 i686 GNU/Linux
x11-apps                             7.3+4
xserver-xorg                         1:7.3+20
libx11-6                             2:1.1.5-2

Testing:
Linux 2.6.30-1-amd64 #1 SMP Sat Aug 15 18:09:19 UTC 2009 x86_64 GNU/Linux
x11-apps                             7.4+2
xserver-xorg                         1:7.4+4
libx11-6                             2:1.2.2-1


Let me know if more information is required.

Regards,

SOB