DOSBox: whole screen turns black

[Philipp]

On Thu, 14 Jul 2011 23:33:17 -0700
perryh at pluto.rain.com wrote:

> Did the system memory size report near the top of the dmesg change
> when you changed the VRAM size?  (I think it should have, since the
> VRAM should be off limits to all other uses, but I don't know the
> area well enough to be sure.)  If it didn't, I suppose there may be
> some kind of weird conflict over memory usage.
> 
> Other than that I am out of ideas.  Maybe someone on emulation@
> will know about interactions between it and the video subsystem.

Yes, system memory size changed, but playing around with the BIOS
options doesn't help. :-/

#1 BIOS options:
DVMT Graphics Memory: 120 MB
DVMT 4.0 Mode: Fixed
Pre-Allocated Memory Size: 1 MB [1 MB | 8 MB]
IGD-Memory Size: 128 MB [128 MB | 256 MB]

dmesg:
real memory  = 2147483648 (2048 MB)
avail memory = 2045972480 (1951 MB)
[...]
vgapci0: <VGA-compatible display> port 0x3410-0x3417 mem
0xd0000000-0xd00fffff,0xc0000000-0xcfffffff irq 16 at device 2.0 on
pci0 agp0: <Intel Q965 SVGA controller> on vgapci0 agp0: aperture size
is 256M, detected 508k stolen memory vgapci1: <VGA-compatible display>
at device 2.1 on pci0
[...]
drm0: <Intel i965Q> on vgapci0
info: [drm] MSI enabled 1 message(s)
info: [drm] AGP at 0xc0000000 256MB
info: [drm] Initialized i915 1.6.0 20080730


#2 BIOS options:
DVMT Graphics Memory: 120 MB
DVMT 4.0 Mode: DVMT
Pre-Allocated Memory Size: 8 MB [1 MB | 8 MB]
IGD-Memory Size: 128 MB [128 MB | 256 MB]

dmesg:
real memory  = 2147483648 (2048 MB)
avail memory = 2038890496 (1944 MB)
[...]
vgapci0: <VGA-compatible display> port 0x3410-0x3417 mem
0xd0000000-0xd00fffff,0xc0000000-0xcfffffff irq 16 at device 2.0 on
pci0 agp0: <Intel Q965 SVGA controller> on vgapci0 agp0: aperture size
is 256M, detected 7676k stolen memory vgapci1: <VGA-compatible display>
at device 2.1 on pci0 [...]
drm0: <Intel i965Q> on vgapci0
info: [drm] MSI enabled 1 message(s)
info: [drm] AGP at 0xc0000000 256MB
info: [drm] Initialized i915 1.6.0 20080730