Hello,

> That info's all in the email I referenced, although I guess since the
> log files got base64 encoded, it's a bit of a hassle to read :) 
Exactly :)

> It's an ATI Radeon (as mentioned in the Subject line). Some details from
> the XFree86.0.log file:
> 
> (--) PCI:*(0:16:0) ATI Radeon QD rev 0, Mem @ 0x98000000/27, 0x90080000/19, I/O@ 0x0400/8, BIOS @ 0x90000000/17
> [ ... ]
> (II) RADEON(0): vgaHWGetIOBase: hwp->IOBase is 0x03b0, hwp->PIOOffset is 0x0000
> (II) RADEON(0): PCI bus 0 card 16 func 0
> (**) RADEON(0): Depth 16, (--) framebuffer bpp 16
> (II) RADEON(0): Pixel depth = 16 bits stored in 2 bytes (16 bpp pixmaps)
> (==) RADEON(0): Default visual is TrueColor
> (==) RADEON(0): RGB weight 565
> (II) RADEON(0): Using 6 bits per RGB (8 bit DAC)
> (--) RADEON(0): Chipset: "ATI Radeon QD (AGP)" (ChipID = 0x5144)
> (--) RADEON(0): Linear framebuffer at 0x98000000
> (--) RADEON(0): MMIO registers at 0x90080000
> (--) RADEON(0): BIOS at 0x90000000
> (--) RADEON(0): VideoRAM: 32768 kByte (64-bit DDR SDRAM)
> (II) RADEON(0): initializing int10
> (WW) RADEON(0): Unable to retrieve all of segment 0x0C0000.
> (II) RADEON(0): No legacy BIOS found -- trying PCI
> (EE) RADEON(0): Cannot read V_BIOS (5)
> (WW) RADEON(0): Video BIOS not detected, using default PLL parameters!
> (II) RADEON(0): PLL parameters: rf=2700 rd=67 min=12500 max=35000; xclk=16615
> (==) RADEON(0): Using gamma correction (1.0, 1.0, 1.0)
> (II) RADEON(0): Generic Monitor: Using hsync range of 27.00-82.00 kHz
> (II) RADEON(0): Generic Monitor: Using vrefresh range of 50.00-72.00 Hz
> (II) RADEON(0): Clock range:  12.50 to 350.00 MHz
> 
> Anyways, my best guess is that the sync signals are incorrect, but I
> don't know why. I seem to recall someone posting a patch that changed
> the PLL parameters, but that didn't work for me.

Did you try XFree 4.4? 

good luck
Michael