radeon 8500 wierd resolution problem

s0ggyfish · 06-30-2003, 03:34 AM

I'm having some trouble getting my radeon 8500 to start x at 1600x1200. It starts just fine at 1280x1024 and 1920x1440 but when I try it at 1600x1200 I get a dark screen, as if the monitor had just gone to sleep. What is also wierd is that the previous card I had in there, a radeon 7200, could do 1600x1200 just fine. Any ideas on how to fix this?

edit: just ran it with another monitor and it appears that when I choose 1600x1200 the hfreq 254khz and the vfreq goes to 231khz. I specified the ranges correctly in the XF86Config file and it works for the other modes, but I have no clue why it goes out of range on 1600x1200. Any ways to force these frequencies ?

finegan · 07-01-2003, 06:35 PM

Weird... You can specify the sync ranges directly in XF86Config, see if that hacks it:

Code:

Section "Monitor"
        Identifier   "Display 2"
        VendorName   "SAM"
        ModelName    "4f26"
        HorizSync    30.0 - 86.0
        VertRefresh  50.0 - 160.0
        Option       "DPMS"
EndSection

As an example of course... make certain to give it the right ranges.

Cheers,

Finegan

s0ggyfish · 07-01-2003, 07:27 PM

Yeah thats pretty much how I have it set, correct Vsync and Hsync ranges set and everything, but it appears X displays those out of range frequencies whenever I try to start it at 1600x1200. Works fine on my other monitor though at any mode. I tried messing around with the ranges a little, and if I set my HorizSync line to 30-93 (instead of 30-92) X uses a reasonalbe frequency, something like 92.7 or so, just barely out of range, so I still get a dark screen. I guess thats a start, closer than the 254.2 I was getting before. I suppose I'll have to mess with it a bit more, thanks.