On Sun, 06 Feb 2005 09:42:32 +1100, Benjamin Herrenschmidt <[EMAIL PROTECTED]> wrote: > I think it could be as simple as an additional sysfs entry > "legacy_enabled" added to all "VGA" devices in the system at the PCI > layer level. Toggling it triggers the "untoggling" of all others, > including VGA forwarding on bridges, and enables the path to that > device. For in-kernel users, a pci_* API would work. > > The problem I see though is that it should all be synchronous & > spinlocked since the vgacon could want to grab at interrupt time (unless > it's locked by userland, in which case, vgacon should cache & trigger an > update later).
This is my current code it adds a vga entry to all VGA devices in the system. http://kerneltrap.org/mailarchive/1/message/15974/flat Instead of toggle there are four states: 1) off 2) on - make sure everything else is off 3) turn off all VGA devices and remember the active one 4) restore the active one States 3 and 4 and used for running the reset program. Set state 3 to remember the active device and turn it off, reset the card which will enable it's VGA, disable it, set state 4 to restore the saved device. This thread is active too: Reliable video POSTing on resume Restart video after resume is the same problem as posting it in the first place. -- Jon Smirl [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
