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On Aug 18, 2013 10:30 AM, "Barry Vercoe" <<a href="mailto:barry@laptop.org.au">barry@laptop.org.au</a>> wrote:<br>
><br>
> Jon, yes the file exists on our system here. Contains just a zero.</p>
<p dir="ltr">Also when HDMI is plugged in? Could you send me a full dmesg output of the HDMI handshake with auto power save enabled?</p>
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> -- barry<br>
><br>
> On 18/08/2013 6:18 p.m., Jon Nettleton wrote:<br>
>><br>
>><br>
>><br>
>><br>
>> On Sun, Aug 18, 2013 at 7:57 AM, Barry Vercoe <<a href="mailto:barry@laptop.org.au">barry@laptop.org.au</a>> wrote:<br>
>>><br>
>>> Of Course!! I used to have that problem when I played long Csound demos -- overworking the Flt Pt processor yet untouched by human hands ... I don't know why I didn't relate the two situations.<br>
>>><br>
>>> Turned off power saving, and the problem immediately went away. <br>
>>> No, power saving doesn't turn off automatically when hdmi is plugged in. Perhaps it should ... <br>
>>> Or at least we should have a warning distributed with the hdmi cable that the port will turn off after 15 seconds with power saving on.<br>
>>><br>
>><br>
>> Could you check something quick for me. Does the status file /sys/devices/d420b000.display/pxa168fb_gfx.1/hpd exist on your system?<br>
>><br>
>> Thanks<br>
>><br>
>> <br>
>>><br>
>>> Thanks all.<br>
>>> -- b<br>
>>><br>
>>> On 18/08/2013 5:26 p.m., Tom Parker wrote:<br>
>>>><br>
>>>> On 18/08/13 17:05, Barry Vercoe wrote: <br>
>>>>><br>
>>>>> OK, with tail -f ... messages, I do see a burst of messages and the <br>
>>>>> projector shows the exact screen. But only for 15 seconds, when the <br>
>>>>> projector then goes blank and reverts to _No Signal_ until I touch <br>
>>>>> something on the XO like the screen, track pad or some key. Apparently <br>
>>>>> the XO has stopped sending hdmi signals, so the projector is reporting <br>
>>>>> exactly that. <br>
>>>><br>
>>>><br>
>>>> When the display goes blank, does the power light start flashing to indicate the laptop has gone to sleep? <br>
>>>><br>
>>>> Try turning off power saving in the settings. When I was testing, the power saving automatically turned off when I plugged in an external display and turned on again when I unplugged it, but perhaps this isn't working on your laptop? <br>
>>><br>
>>><br>
>>><br>
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