Ville, I am at a total loss. Would any additional log files be of help here? Which ones? (Perhaps kernel .config file?) I have a gut feeling that the better-performing system is just around the corner so-to-speak, but I have no clue how to get there. Thanks for the reply!
Olek ---------------------------------------- > Date: Thu, 14 May 2009 16:21:52 +0300 > From: syrj...@sci.fi > To: kukur...@live.com > CC: ni...@directfb.org; directfb-users@directfb.org > Subject: Re: [directfb-users] Matrox G550 + DVI accelerated - how? > > On Tue, May 12, 2009 at 12:47:46PM -0500, Olek Grotowski wrote: >> >> Niels, >> >> Thanks again for the reply. I forgot to send my question to the server and >> instead it went directly to you, sorry about that. >> >> Here's a few crazy, possibly eye-rolling questions: >> Is DVI sort-of hardwired to CRTC2, hence no accel? > > CRTCs don't have anything to do with acceleration as such. The only > exception is the video overlay (BES) which is tied to CRTC1 but you can > achieve the same things that the BES does (scaling and color space > conversion) by using the texture engine. So really the CRTC used > should not matter, well unless the application can only do things one > way. > >> If negative, can it be mapped over to CRTC1? > > I think matroxfb always uses CRTC1 to drive the DVI output. > >> My G550 is a single VGA/single DVI outputs card. IIRC the VGA output is the >> high-performance one. > > The primary analog output (DAC1) has a higher pixel clock limit than > the secondary analog output (DAC2). The panel output has a different > pixel clock limit than the analog outputs. Those are the chip's > internal outputs BTW, how they map to the physical connectors depends > on the board itself. I think on a typical AGP G550 DAC1 and panel > outputs go to the DVI-I connector and DAC2 to the VGA connector. But > anyways there's no performance difference between the outputs. > >> Would matroxset, fbset (or outputs:XYZ in grub config file) be of any help >> here? > > No, shouldn't do any difference. > >> As mentioned before, being a newbie, I am confused by the dfb/matroxfb >> terminology. >> Thanks in advance for any help. > > I don't know what software you're using but it may be doing something > stupid which kills your performance. Another option is that your MTRRs > are not properly set up. I actually have a the MTRR issue on my current > system. The BIOS doesn't set up a WC MTRR for the frame buffer and the > MTRR layout it uses prevents me from simply adding the WC MTRR myself. > Also PAT doesn't seem to be able to do the trick either. Fortunately > the CPU (2.4GHz C2D) is fast enough so I don't really notice the > problem. My CPU load is ~20% when watching SD stuff. > > -- > Ville Syrjälä > syrj...@sci.fi > http://www.sci.fi/~syrjala/ _________________________________________________________________ Hotmail® has ever-growing storage! Don’t worry about storage limits. http://windowslive.com/Tutorial/Hotmail/Storage?ocid=TXT_TAGLM_WL_HM_Tutorial_Storage1_052009 _______________________________________________ directfb-users mailing list directfb-users@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users
