On 7 May 2014 17:16, Aaron Plattner <aplattner@xxxxxxxxxx> wrote: > On 05/03/2014 02:00 AM, Chris Wilson wrote: >> >> On Sat, May 03, 2014 at 07:08:02AM +1000, Dave Airlie wrote: >>> >>> On 2 May 2014 18:52, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote: >>>> >>>> On Fri, May 02, 2014 at 02:39:37PM +1000, Dave Airlie wrote: >>> >>> the GUID is only on DP 1.2 devices, so you don't get one for ever >>> port, also GUIDs are wiped on powerdown on most devices, default GUID >>> is 0 except where devices have USB hubs as well, so it probably >>> doesn't make much sense to bother exposing them directly. >> >> >> Ok. It looks like if we do attempt to maintain persistent naming, we need >> to do it in the kernel anyway. That is to make sure that a downstream >> device always has the same type-id upon reconnection - at least for the >> lifetime of module. Or maybe the output name is irrelevant for >> preserving extended desktop configurations? > > > Dunno if it helps, but for roughly similar reasons we ended up naming the > outputs based on their topology paths in the NVIDIA driver. So for example > a port named DP-3 that has a Dell UP2414Q attached will show up as two > outputs named DP-3.1 and DP-3.8 since its internal bridge uses downstream > ports 1 and 8. This has worked out fairly well in practice. > > Here's how I described it in the README: > > When DisplayPort 1.2 branch devices are present, display > devices will be created with type- and connector-based names > that are based on how they are connected to the branch device > tree. For example, if a connector named DP-2 has a branch > device attached and a DisplayPort device is connected to the > branch device's first downstream port, a display device named > DP-2.1 might be created. If another branch device is > connected between the first branch device and the display > device, the name might be DP-2.1.1. > > To avoid cluttering the output list, DisplayPort 1.2 devices > can be deleted when they are no longer connected and are not > named in any MetaModes. This behavior can be enabled with the > DeleteUnusedDP12Displays option. > > http://us.download.nvidia.com/XFree86/Linux-x86/337.19/README/displaydevicenames.html Is the cleaning up an option because it caused some problems? I'm seeing some gnome-settings-daemon, gnome-shell crash because the XIDs are gone away and they get X errors, just wondering if this is what you were seeing, Dave. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
