The problem is that the Asus M6A doesn't give any EDID information that xorg can use to set the right mode. See discussion on bug 333644. There is a master bug report where one can report hardware that has this deficiency. Bug 194760. Setting this bug as a duplicate of that.
The problem is that the Asus M6A doesn't give any EDID information that xorg can use to set the right mode. See discussion on bug 333644. There is a master bug report where one can report hardware that has this deficiency. Bug 194760. Setting this bug as a duplicate of that.