[Bug 50125] Radeon KMS mis-detects present connectors

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=50125

--- Comment #3 from Alex Deucher <agd5f at yahoo.com> 2012-05-21 10:17:57 PDT ---
(In reply to comment #2)
> 
> Does this mean that the other connectors are not usable until reboot or does
> plugging around still work? If so does the list of connectors get updated on
> hotplug or which connector corresponds to which name depend on what was
> connected?

The active connector list is fixed once the sbios boots.  To change it you have
to reboot.  Due to the way the ports are wired up, only certain combinations
are allowed (as detailed by the manual).

> 
> How does the whole thing behave in the event that something was connected to
> each connector? (e.g. is it possible to choose using xrandr which of the
> connectors should effectively be used or does one depend on BIOS's guess?)

The sbios makes an educated guess if all of the connected are connected on
boot.  xrandr only knows about the connectors that the driver provides.  The
driver only knows about the connectors that are enumerated by the sbios at
boot.  There's no way for the driver to know all of the possible combinations
available on any specific board.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.