At Mon, 21 Nov 2011 09:58:09 +0800, Wu Fengguang wrote:
On Sat, Nov 19, 2011 at 01:46:44AM +0800, Keith Packard wrote:
On Fri, 18 Nov 2011 17:37:40 +0800, Wu Fengguang fengguang.wu@intel.com wrote:
However when in X, ->mode_set won't be called at all. Only ->get_modes and ->detect are called...
The desktop software will call mode_set when it configures the monitor. Otherwise, it's not being used (and so shouldn't have audio routed to it by default).
Keith, I experimented playing HDMI audio in X, and during the time unplug and plug the monitor. The HDMI audio/graphics all continue to work when plugged in the monitor again. Here is the dmesg showed for the plug event, no ->mode_set is called at all...
Which desktop system are you using? At hotplug/unplugging, the kernel drm issues a udev event, X Intel driver receives it and updates Xrandr. Then it's supposed that a daemon like gnome-settings-daemon receives Xrandr notification and changes the modes appropriately. Without such a background task, there will be no mode change.
Takashi