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<div class="moz-cite-prefix">OK, with tail -f ... messages, I do see
a burst of messages and the projector shows the exact screen. But
only for 15 seconds, when the projector then goes blank and
reverts to <u>No Signal</u> until I touch something on the XO
like the screen, track pad or some key. Apparently the XO has
stopped sending hdmi signals, so the projector is reporting
exactly that.<br>
<br>
Is this the XO hdmi port going to sleep? And do I have control
over some time constant?<br>
Or perhaps my projector is going blank when it sees no recent
activity on the port. Might it be expecting at least a screen
refresh over the hdmi channel? I don't have a projector manual
that would describe that ...<br>
It seems I can jiggle the HDMI cable a fair bit without issue, so
I think the physical connection is sound.<br>
Just not clear on who is exercising the time constant in between
gestures to the XO.<br>
<br>
-- b<br>
<br>
On 18/08/2013 4:00 p.m., Tom Parker wrote:<br>
</div>
<blockquote cite="mid:521046C2.70807@carrott.org" type="cite">On
18/08/13 15:01, Barry Vercoe wrote:
<br>
<blockquote type="cite">Tom, attached is a file dmesg.output.
Sending just to you since I didn't
<br>
understand what mailing list you meant.
<br>
</blockquote>
<br>
olpc-devel, Jon Nettleton who was involved with the HDMI code is
monitoring that list. I've copied them in and re-attached your
dmesg output.
<br>
<br>
<blockquote type="cite">It may well be a problem with my
micro-to-standard hdmi cable, since I
<br>
don't hear a click when I plug it in. The cable is a Pudney
P594 Type A
<br>
plug to Type D plug, think from Dick Smith (no one else seemed
to have
<br>
one ...).
<br>
</blockquote>
<br>
The click is a mechanical one and quite faint and doesn't always
happen. Sometimes you feel it with your fingers rather than hear
it.
<br>
<br>
I have this one
<a class="moz-txt-link-freetext" href="http://www.pbtech.co.nz/index.php?z=p&p=CABDNX8018">http://www.pbtech.co.nz/index.php?z=p&p=CABDNX8018</a> and they
also have 2m versions and an adaptor which might be more
appropriate if it is what I think it is (there's no picture). With
an adaptor the school would need to supply a regular HDMI cable
rather than a female-female adaptor and a cable -- whatever length
you supply will be too short).
<br>
<br>
<blockquote type="cite">Tell me if you don't see the connection in
dmesg. Perhaps a razor blade
<br>
to the connector will get it further in till I hear a click (is
that
<br>
audio out, or physical?)
<br>
</blockquote>
<br>
It's obviously doing something -- you can see the HDMI system
start and select 1080p:
<br>
<br>
[ 88.056712] Using config for 1920x1080 CEA
<br>
<br>
This is the last 4 lines you quoted:
<br>
<br>
[ 88.069656] hdmi_video_cfg: I have auto-learned the video frame
format
<br>
[ 88.076560] ++++++++++++ hdmi_hpd_work state 0 hdmi_state 1
<br>
[ 88.992348] work_launch
<br>
[ 88.992400] ++++++++++++ hdmi_hpd_work state 4000 hdmi_state 0
<br>
<br>
I see the first two of those, but not the second two.
<br>
<br>
I wonder if you have a bad connection? Try pressing the cable into
the socket and holding it there.
<br>
<br>
You can watch the output of this log in real time by typing the
following into terminal:
<br>
<br>
tail -f /var/log/messages
<br>
<br>
It should show you the last few lines of the the log and then
print out any new log messages. You should see a burst of messages
when you plug the cable in.
<br>
</blockquote>
<br>
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