On Thu, 24 Feb 2005, tw at wrote: > Hi all. Sorry if I double posted this, I have a new email > account. > > Trying to get a dual-head setup going with XFree86 4.3.0. > Everything works fine except one thing: My Matrox Millenium II > (4MB PCI) won't run at 1280x1024 24bpp. It claims there's > insufficient memory for that mode. Now, I'm not entirely sure > how video RAM is allocated, but in terms of raw pixel data > 1280*1024*3 = 3932160 and 4MB = 4194304, therefore should fit > with 256KB to spare? > (**) MGA(1): Depth 24, (--) framebuffer bpp 32 It's using 4 bytes per pixel. I believe 4 bytes per pixel is necessary for Matrox cards if 3D acceleration is to be used so the driver defaults to that whenever support for the DRI is built in. See the XF86Config man page. I believe you can override that with the FbBpp option. You'd only want to set that for the Matrox card because the NVIDIA cards do not support 24bpp framebuffers. Mark. _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86
