Yes Tormod, my card (9250) works with 8x by default and after 6.8 release, i don't have any problem.
Do you know what that AGP 3.5 means, i rarely seen this in other people dmesgs?
[ 54.612510] agpgart: Found an AGP 3.5 compliant device at 0000:00:00.0.
[ 54.613322] agpgart: Putting AGP V3 device at 0000:00:00.0 into 8x mode
[ 54.614004] agpgart: Putting AGP V3 device at 0000:01:00.0 into 8x mode
[ 54.984980] [drm] Setting GART location based on new memory map
[ 54.984997] [drm] Loading R200 Microcode