> I'm running XFree 4.3.99.8 with kernel 2.6.0.test2 on a via M10000 > motherboard. > I loaded the modules for mtrr, i2c and agpgart for via. > > Into XF86Config I choose via driver > When I start X there's always this warning: > > (WW) via(0): Failed to set up write-combining range (0x.... > I tried with > less /proc/mtrr > and it gives back "correct" values, at least they seem > reasonable but I can > write them down. > Anyway X seems to run fine, so what problems may I expect to > encounter?
i cant say what direct reaction your software setup will perform on mtrr setup failurs. mtrrs are programmed to achive specific cache flushing behaviour and increased performance, especially as framebuffer writes and maybe for AGP mapped memory access as well. if mtrr fails, the performance might be sub optimal or you might spot (in worst case) hangs due to inadequate cache flushing. for tracking that down you might need to understand your chipset and the respective mtrr allocation code in the linux kernel. i dont want to say that code is bogus, but i have seen that it does react somewhat non logical in a few cases, so there might be a need for deeper inspection at some point in time. -Alex. _______________________________________________ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
