Hi

Searching through the archives I have found some reports of problems
with the radeon framebuffer, but done that seems to fully match my
experiences. 

I have an Asus L3800C laptop with a Radeon Mobility 7500 graphics
chip. 

I have made three slightly different 2.6.0-test6 kernels, called
test6-1, test6-2 and test6-3. The only differences are what framebuffer
drivers are included. Test6-1 includes both the vga16 driver and the
radeon driver, test6-2 only includes the radeon driver, and test6-3 only
includes the vga16 driver.

All three kernels boot, and everything seems to run fine. 

With test6-3 I get a fully functional framebuffer running 640x480-59.

With test6-2 I get a framebuffer that looks like it has a sync
problem. Horizontal lines are horizontal, but vertical lines are
displayed as individual dots, for each horizontal line of pixels 8
pixels further right.

With test6-1 I get the ASUS logo (which is displayed during POST) with
vertical green and blue lines running from near the top of the screen
and about 3/4 of the way down. At the top of the screen are some moving
white pixels.

Output of `lspci`:
00:00.0 Host bridge: Intel Corp. 82845 845 (Brookdale) Chipset Host Bridge (rev 04)
00:01.0 PCI bridge: Intel Corp. 82845 845 (Brookdale) Chipset AGP Bridge (rev 04)
00:1d.0 USB Controller: Intel Corp. 82801CA/CAM USB (Hub #1) (rev 02)
00:1d.1 USB Controller: Intel Corp. 82801CA/CAM USB (Hub #2) (rev 02)
00:1e.0 PCI bridge: Intel Corp. 82801BAM/CAM PCI Bridge (rev 42)
00:1f.0 ISA bridge: Intel Corp. 82801CAM ISA Bridge (LPC) (rev 02)
00:1f.1 IDE interface: Intel Corp. 82801CAM IDE U100 (rev 02)
00:1f.5 Multimedia audio controller: Intel Corp. 82801CA/CAM AC'97 Audio (rev 02)
00:1f.6 Modem: Intel Corp. 82801CA/CAM AC'97 Modem (rev 02)
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M7 LW [Radeon Mobility 7500]
02:05.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
02:07.0 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev a8)
02:07.1 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev a8)
02:07.2 FireWire (IEEE 1394): Ricoh Co Ltd R5C552 IEEE 1394 Controller

I have attached the configuration file for test6-1, here are the diffs
for the two other kernels.

grove@julia:/boot% diff -u config-2.6.0-test6-1 config-2.6.0-test6-2
--- config-2.6.0-test6-1        2003-09-30 15:49:06.000000000 +0200
+++ config-2.6.0-test6-2        2003-09-30 15:51:45.000000000 +0200
@@ -1083,7 +1083,7 @@
 CONFIG_FB=y
 # CONFIG_FB_CYBER2000 is not set
 # CONFIG_FB_IMSTT is not set
-CONFIG_FB_VGA16=y
+# CONFIG_FB_VGA16 is not set
 # CONFIG_FB_VESA is not set
 # CONFIG_VIDEO_SELECT is not set
 # CONFIG_FB_HGA is not set
grove@julia:/boot% diff -u config-2.6.0-test6-1 config-2.6.0-test6-3 
--- config-2.6.0-test6-1        2003-09-30 15:49:06.000000000 +0200
+++ config-2.6.0-test6-3        2003-09-30 15:52:44.000000000 +0200
@@ -1090,7 +1090,7 @@
 # CONFIG_FB_RIVA is not set
 # CONFIG_FB_I810 is not set
 # CONFIG_FB_MATROX is not set
-CONFIG_FB_RADEON=y
+# CONFIG_FB_RADEON is not set
 # CONFIG_FB_ATY128 is not set
 # CONFIG_FB_ATY is not set
 # CONFIG_FB_SIS is not set
grove@julia:/boot%

.Henrik