I had the same problems with my ancient Matrox Mystique (Monitor shows frequency out of range)
I solved it by turning on the ShadowFB option: Section "Device" Identifier "Matrox Graphics, Inc. MGA 1064SG Mystique]" Driver "mga" BusID "PCI:0:12:0" Option "ShadowFB" "true" Option "OldDmaInit" "True" EndSection (The OldDmaInit options seems not to matter) I had to specify the HorizSync and VertRefresh options for my monitor. Now it works with a resolution of "1024x768" and a Depth of 16. I had the same problem when installing Dapper. -- Edgy upgrade breaks multiple Matrox cards https://launchpad.net/bugs/58721 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs