Duncan Webb wrote: > Duncan Webb wrote: >> Ville Syrjälä wrote: >>> On Mon, Jan 12, 2009 at 06:09:00PM +0100, Duncan Webb wrote: >>>> Ville Syrjälä wrote: >>>>> On Sun, Jan 04, 2009 at 05:55:57PM +0100, Duncan Webb wrote: >>>>>> Duncan Webb wrote: >>>>>>> Hi all, >>>>>>> >>>>>>> Does anyone know how to enable the S-Video output of the Matrox G400 >>>>>>> DualHead MAX with recent 2.6 kernels? >>>>>> The answer to this is clear when looking at the maven_init in >>>>>> gfxdrivers/matrox/matrox_maven.c function. The code is looking for >>>>>> /sys/class/i2c-dev which has been superseded by i2c-adapter so it cannot >>>>>> find the frame buffer device. >>>>> I don't think i2c-dev has gone anywhere. At least I still have it w/ >>>>> 2.6.28. Maybe you just don't have the i2c-dev module loaded. >>>> I seems to have come back again, looks like if disappeared at about >>>> 2.6.17 and came back again at 2.6.19. Of course I could have messed up >>>> my kernel configuration. >>> Perhaps. I don't have such old kernel trees around anymore but I would >>> expect that I would have used at least some kernels from that era. >>> >>>> May I ask which versions of DirectFB and linux-fusion you are using? >>> Latest git. >> Now that I have DirectFB working fine, I am wondering if there are any >> problems with SDL and DirectFB. I have a small pygame test program, it >> was to test the changes from Numeric and numpy. >> >> When I run this program using DirectFB as the SDL driver the CPU usage >> is about 50%, which is rather a lot for 1 blit per second. When the same >> program is run on X it uses somewhere betweeen 0 and 0.5% CPU. >> >> What I would like to do is to try to track down the problem. Are there >> any SDL and DirectFB test programs about that will the same thing? > > > Some more information... > > I tracked down a SDL tutorial: > http://lazyfoo.net/SDL_tutorials/lesson02/index.php > > Built the program and then ran this with the environment: > export SDL_DIRECTFB_MGA_OVERSCAN=1 > export SDL_VIDEODRIVER=directfb > export SDL_DIRECTFB_MGA_STRETCH=1 > > The CPU usage is 67% during the call to SDL_sleep. To me this implies > that directfb is using all the CPU just redrawing the screen. > > Any ideas what this problem could be or where to look?
The penny has dropped: I had set autoflip-window in directfbrc because of this message SDL_DirectFB: Unsupported pixelformat (0x00200806)! not sure how to read the pixelformat SDL DirectFB_SetVideoMode: 800x...@32, flags: 0x00000000 (!!!) *** WARNING [Non-flipping window surface and no 'autoflip-window' option used] *** [idirectfbsurface_window.c:319 in IDirectFBSurface_Window_Construct()] Now the CPU usage is a respectable 1% (still a bit high for a sleep) Duncan _______________________________________________ directfb-users mailing list directfb-users@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users
