PROBLEM: Asus C201 video mode problems on HDMI hotplug (regression)
nbowler at draconx.ca
Mon Dec 4 18:33:52 UTC 2017
On 2017-12-04 10:04 +0000, Jose Abreu wrote:
> On 03-12-2017 05:20, Nick Bowler wrote:
> > I brought the original test equipment back to the setup so I can
> > see the video and pink bar again. The symptoms remain the same
> > (unexpected size, pink bar, and no audio).
> Can you tell me which test equipment are you using?
I am using an XRGB-Mini Framemeister as the sink device for testing
which isn't "real" test equipment but does show details of the video
and audio mode (which the monitor I have does not do).
The normal setup of this laptop has a small "audio splitter" as
the sink, which among other things includes HDMI input and output
ports and an S/PDIF audio output.
These devices can be connected together in various ways and the
results seem to be consistent in any configuration.
> > It is very consistent: pink bar <=> no audio.
> > My suspicion is that the audio problem is just the wrong video mode
> > on the sink side messing things up, but I have no way of confirming
> > that (that I know of).
> Hmmm, my first thought was that audio is being configured first
> because of the phy lock wait time, I've seen this happening before.
> Lets try this:
> - Disable all alsa clients (e.g. pulseaudio, ...) so that no one
> tries to configure audio.
> - Plug out/in the cable until the issue appears
> - When the issue appears use aplay to play audio through the HDMI
> - Repeat several times with different audio rates and with no
> resample (you can use the plughw interface in aplay).
OK, I will give it a try later this evening.
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