Is the driver being run as a host or guest when the flickering happens? If it's a guest, It sounds like it may be a virtualbox issue. With the latest driver bits from git master, the following option may help:
Option "DisplayPriority" "HIGH"
in the device section of your config.
Is the driver being run as a host or guest when the flickering happens? If it's a guest, It sounds like it may be a virtualbox issue. With the latest driver bits from git master, the following option may help:
Option "DisplayPriority" "HIGH"
in the device section of your config.