AGP transfer mode 8x -> 4x

Opako · 10-22-2005, 07:14 AM

Hey. Does anyone know how to set agp mode from 8x to 4x? I have tried to put Option "AGPMode" "4" to my XF86config but after i restart X i get message (WW) fglrx(0): Option "AGPMode" is not used to my Xfree86.0.log file. I already checked BIOS too for agp mode setting but couldnt find one. My graphics card is Sapphire Radeon 9800 Pro and i am using FGLRX drivers that has 3d support in it (cant find link to it but its first thing you find in google when you put FGLRX to search)
Thank you for your help.

Opako · 10-22-2005, 06:07 PM

Ok, i think i got this one solved. I added AGPMask option to XF86Config.
It goes under device section and looks like: Option "AGPMask" "value"

AGPMask:
0x00000001 = AGP 1x disable (force 2x and/or 4x)
0x00000002 = AGP 2x disable (force 1x and/or 4x)
0x00000004 = AGP 4x disable (force 1x and/or 2x)
0x00000010 = fast writes disable
0x00000200 = Sidebanding disabled

AGPv3Mask:
0x00000001 = disable AGP 4x (force 8x)
0x00000002 = disable AGP 8x (force 4x)

Thank you LinuxQuestions.