It seems that Nvidia proprietary drivers and Dosbox don't mix. No configuration combination seems to be able to provide me with the desired scaling result. I would simply like to have the output scaled on my full screen, preferably without any filters. All I get is a small, postal-stamp-sized image in the middle of the screen.

Also, trying to run dosbox at lower resolutions than my primary resolution (1024*768@100 Hz) just doesn't work in full screen. At the moment I enable full screen, dosbox dies with the following message:

X Error of failed request: BadValue (integer parameter out of range for operation)
Major opcode of failed request: 135 (XFree86-VidModeExtension)
Minor opcode of failed request: 10 (XF86VidModeSwitchToMode)
Value in failed request: 0x135
Serial number of failed request: 153
Current serial number in output stream: 155

I suppose it's sdl-related as scummvm seems to be suffering from the same fault, too.

Any suggestions?

I'm running Gentoo Linux. A small summary of relevant information:

$X -version

X Window System Version 7.0.0
Release Date: 21 December 2005
X Protocol Version 11, Revision 0, Release 7.0
Build Operating System:Linux 2.6.16-gentoo-r13 i686
Current Operating System: Linux shilka 2.6.17-gentoo-r4 #2 SMP PREEMPT Thu Aug 3 16:30:52 EEST 2006 i686
Build Date: 21 July 2006
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Module Loader present

$uname -r
2.6.17-gentoo-r4

nvidia-kernel version 1.0.8762-r1