Sam Morris wrote: > Both systems are, in case it matters, VirtualBox virtual machines. > Sounds like clutching at straws though... unless there's something about > the capabilities of the vboxvideo X11 driver that causes applications to > behave differently. > > I thought I'd try using xtrace to see the conversation between the > client and server: [...] > Hmm. wait a minute... no SECURITY extension on my display? According to > xdpyinfo it is so. I have xserver-xorg-core 2:1.7.4-2; would you mind > telling me which version you have, and whether SECURITY shows up in the > output of xdpyinfo?
I have xserver-xorg-core 2:1.7.5-1. SECURITY doesn’t show up in xdpyinfo, and if I try “startx -- :1 +extension nonsense”, I learn that the server doesn’t even know about it: [mi] Extension "nonsense" is not recognized [mi] Only the following extensions can be run-time enabled: [mi] Generic Events [mi] Composite [mi] DAMAGE [mi] DOUBLE-BUFFER [mi] DPMS [mi] GLX [mi] MIT-SCREEN-SAVER [mi] MIT-SHM [mi] RANDR [mi] RENDER [mi] X-Resource [mi] XFree86-DGA [mi] XFree86-DRI [mi] XFree86-VidModeExtension [mi] XFIXES [mi] XINERAMA [mi] SELinux [mi] XTEST [mi] XVideo I get the impression from the following thread that it should have shown up in that list if this build of X supported it. http://lists.freedesktop.org/archives/xdg/2008-December/010104.html The more interesting relevant change I can find in the xserver-xorg-core changelog is commit 1c6cb353f77747c101ce47716ff1fa055fbf85a4 Author: Eamon Walsh <ewa...@tycho.nsa.gov> Date: Thu Nov 8 16:46:49 2007 -0500 Restore the XC-SECURITY option in configure.ac, but disabled by default. which is long before 1.7.4. It seems XC-SECURITY (is that the same as X11 SECURITY?) was being phased out and XACE phased in. Unfortunately, I know nothing about these things, so I cannot say what is expected behavior, what is wrong, what should be the same between different systems, and so on. Sorry I cannot be of more help. I’ll try downgrading to X from testing and see if that helps reproduce this. Jonathan -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
