In <[EMAIL PROTECTED]>, Ville Syrjälä wrote:

> There's your problem len should be 0x1000000 (ie. 16MB) when it gets 
> subtracted from off. Somehow matroxfb first told you it has 16MB of 
> video RAM and then when calling mmap() it thinks it has only 8MB.
> 
> You aren't playing some modprobe/rmmod game with matroxfb_crtc2 + 16MB 
> card are you?

No, it's compiled into the kernel. It is a 16MB card according to the
startup messages in kern.log though. My other machine has 32MB according
to kern.log and that has similar symptoms, but I haven't investigated
that one so thoroughly. I've tried adding mem:16M to the kernel's video
options, and then mem:8M but neither made any difference.

The FB bits of my kernel config are below. Have I got something wrong
there? I think CONFIG_FB_MATROX_I2C is superfluous and that isn't
enabled on the second PC. Maybe the problem is due to having VESA
enabled too? Or because I use fb consoles?

#
# Graphics support
#
CONFIG_FB=y
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
CONFIG_FB_SOFT_CURSOR=y
# CONFIG_FB_MACMODES is not set
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_TILEBLITTING=y
# CONFIG_FB_CIRRUS is not set
# CONFIG_FB_PM2 is not set
# CONFIG_FB_CYBER2000 is not set
# CONFIG_FB_ARC is not set
# CONFIG_FB_ASILIANT is not set
# CONFIG_FB_IMSTT is not set
# CONFIG_FB_VGA16 is not set
CONFIG_FB_VESA=y
CONFIG_VIDEO_SELECT=y
# CONFIG_FB_HGA is not set
# CONFIG_FB_NVIDIA is not set
# CONFIG_FB_RIVA is not set
# CONFIG_FB_I810 is not set
# CONFIG_FB_INTEL is not set
CONFIG_FB_MATROX=y
# CONFIG_FB_MATROX_MILLENIUM is not set
# CONFIG_FB_MATROX_MYSTIQUE is not set
CONFIG_FB_MATROX_G=y
CONFIG_FB_MATROX_I2C=y
# CONFIG_FB_MATROX_MAVEN is not set
# CONFIG_FB_MATROX_MULTIHEAD is not set
# CONFIG_FB_RADEON_OLD is not set
# CONFIG_FB_RADEON is not set
# CONFIG_FB_ATY128 is not set
# CONFIG_FB_ATY is not set
# CONFIG_FB_SAVAGE is not set
# CONFIG_FB_SIS is not set
# CONFIG_FB_NEOMAGIC is not set
# CONFIG_FB_KYRO is not set
# CONFIG_FB_3DFX is not set
# CONFIG_FB_VOODOO1 is not set
# CONFIG_FB_CYBLA is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_GEODE is not set
# CONFIG_FB_S1D13XXX is not set
# CONFIG_FB_VIRTUAL is not set


-- 
TH * http://www.realh.co.uk

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