Description of problem: When using a Matrox G550 adapter with the open-source mga X driver it reports that it supports up to 1024x768, however, with this resolution the vertical refresh rate sent to the cable is too low for most of the monitors, even if the configuration is setting the refresh rate to 60Hz, limiting the usable resolutions up to 800x600. When I create a custom xorg.conf forcing X to use the fbdev driver I can use this adapter with 1024x768 or even higher resolutions, all of them with the correct refresh rate. I understand that there are several bugs that have been already opened against this issue and that these bugs on the mga open-source driver are unlikely to get fixed due to the lack of documentation of this hardware, but is there any way we can document this limitation on the open-source driver and indicate a workaround on the xorg.conf file using the fbdev driver? Version-Release number of selected component (if applicable): xorg-x11-drv-mga-1.6.2-7.fc19.ppc64 How reproducible: Always Steps to Reproduce: 1. When using a Matrix G550 adapter, start the X server with the default probed configuration, which will use the mga driver. Actual results: Monitor cannot display the image when using the highest resolution supported by the mga driver (1024x768). Expected results: Monitors able to display images at 1024x768 or even higher resolutions supported by the hardware. Additional info:
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