imrazor Posted June 10, 2010 Share Posted June 10, 2010 I've successfully installed SL onto my gaming PC, but am still trying to work out a few kinks. One of the problems I've run into is with the available BIOS modes. The widest aspect ratio available (according to PCEFI) is 1280x1024 at 5:4. There are other much higher resolutions available (such as 1920x1440), but all of these modes are 4:3. I have two widescreen monitors available to me, and they both insist on stretching the 1280x1024 to their native resolution, resulting in a nasty looking picture. Do I have any options here, short of hacking the video BIOS? I checked with the manufacturer support and there is no BIOS update available for my card (XFX Radeon HD 5750 1GB.) Are the list of video modes provided by PC-EFI taken from the BIOS or are they determined by PC-EFI? Could PC-EFI "trick" the card and/or into displaying an aspect ratio native to the monitor? Please note, I'm not looking to get QE/CI working. I know that's impossible just now, though I have hope that the next iMac/Mac Pro refresh will include 5750 support. Link to comment https://www.insanelymac.com/forum/topic/220698-ati-5750-vesa-mode-problem/ Share on other sites More sharing options...
Beerkex'd Posted June 10, 2010 Share Posted June 10, 2010 The list of available modes during boot is pulled from your video card's BIOS. Try this: http://forum.voodooprojects.org/index.php/topic,1227.0.html Link to comment https://www.insanelymac.com/forum/topic/220698-ati-5750-vesa-mode-problem/#findComment-1485656 Share on other sites More sharing options...
imrazor Posted June 12, 2010 Author Share Posted June 12, 2010 The list of available modes during boot is pulled from your video card's BIOS. Try this: http://forum.voodooprojects.org/index.php/topic,1227.0.html Thanks, Beerkex'd! That worked very well, though not quite as described in the thread. I found that I was unable to change the Graphics Mode at boot, but when specified in com.apple.Boot.plist I got a screen at my Cinema Display's native resolution (1600x1024). Another source of confusion was the fact that Chameleon was looking in /Extra instead /Library/Preferences/SystemConfiguration for the config file. When did that change? While I have a display at native rez now, I'm not certain that videos will play well at that high a resolution with the VESA driver. I'm probably going to end up dropping the rez to 1280x800 or so. Anyway, thanks much! Link to comment https://www.insanelymac.com/forum/topic/220698-ati-5750-vesa-mode-problem/#findComment-1487317 Share on other sites More sharing options...
Recommended Posts