I'm running Redhat 9.0 on a Dell Inspiron 600M laptop. I have pretty
much the default installation (I'm too Linux clueless at the moment
to get creative) and it worked great for a spell. Now I'm getting the
problem after a few hours the backlight on the LCD quits leaving the
screen in the dark.

Does anyone think this maybe an issue with XFree86 or the Radeon ATI
driver? I have read some bug report on the XFree website advising to
turn off dpms and 3D support which I've done to no avail.

It may be a hardware thing on the computer - the backlight quitting
seems to be a problem on some (Dell) laptops. I can shutdown the
computer and switch it off and restart and the backlight is still
dead. Then restarting a second time and it works fine for 3 to 7
hours.

I'm probably out of luck getting Dell support having an unsupported OS
and would like to rule out the Linux install as the culprit.

Thanks


here's some config info:

Section "Device"
Identifier "Videocard0"
Driver "radeon"
VendorName "Videocard vendor"
BoardName "ATI Radeon Mobility M9"
EndSection


and some snippets of XFree86.0.log info:


XFree86 Version 4.3.0 (Red Hat Linux release: 4.3.0-2)
Release Date: 27 February 2003
X Protocol Version 11, Revision 0, Release 6.6
Build Operating System: Linux 2.4.20-3bigmem i686 [ELF]

.....

(II) LoadModule: "radeon"
(II) Loading /usr/X11R6/lib/modules/drivers/radeon_drv.o
(II) Module radeon: vendor="The XFree86 Project"
compiled for 4.3.0, module version = 4.0.1
Module class: XFree86 Video Driver
ABI class: XFree86 Video Driver, version 0.6
(II) LoadModule: "ati"
(II) Loading /usr/X11R6/lib/modules/drivers/ati_drv.o
(II) Module ati: vendor="The XFree86 Project"
compiled for 4.3.0, module version = 6.4.18
Module class: XFree86 Video Driver
ABI class: XFree86 Video Driver, version 0.6

(--) Chipset ATI Radeon Mobility M9 Lf (AGP) found

(II) RADEON(0): Largest offscreen area available: 1024 x 7421
(II) RADEON(0): Using XFree86 Acceleration Architecture (XAA)
(II) RADEON(0): Acceleration enabled
(==) RADEON(0): Backing store disabled
(==) RADEON(0): Silken mouse enabled
(II) RADEON(0): Using hardware cursor (scanline 770)
(II) RADEON(0): Largest offscreen area available: 1024 x 7417
(II) RADEON(0): Direct rendering disabled
(II) RADEON(0): Using XFree86 Acceleration Architecture (XAA)
Screen to screen bit blits
Solid filled rectangles
8x8 mono pattern filled rectangles
Indirect CPU to Screen color expansion
Solid Lines
Scanline Image Writes
Offscreen Pixmaps
Setting up tile and stipple cache:
32 128x128 slots
32 256x256 slots
16 512x512 slots