Am Mon, 19 Sep 2016 12:14:04 -0400 hat Roy Gillotti
<gillottir@gmail.com> geschrieben:

Hi Roy,

as Nikolaus mentioned that he never connected HDMI to the board:
Can you do the tests with HDMI disconnected?

That would tell us whether Nikolaus has a special EVM (or magic AC
Adaptor) or whether the issue REALLY has something to do with HDMI.

> What Kernel are you using? I've upgraded to the letux 4.8 RC5 via
> aTc's repo update and noticed this behavior with my bench supply
> capable of delivering 4A.
>
> 5.1V - Some instabilities HDMI, SATA resets and USB devices blink out.
> Sometimes freezes before getting to X.
>
> 5.2V - Boots up Consistently. random Freezes when using Firefox when
> attempting to watch a Youtube video. Sometime just HDMI blinks out
> occasionally.
>
> 5.3V - Seems stable running CPU intensive things. Firefox running
> youtube video, running 720p video in smplayer and quake 2 at once.
> highest current draw observed ~1.6A during spikes. Random Freeze
> occurs generally within 5 to 10 minutes of use.
>
> 5.4V - Same as 5.3V
>
> 5.5V - Same as 5.4V
>
> 5.6V - 5V LED blinks, HDMI blinks out or won’t go into a resolution
> above 1024x768. Can seem to use firefox, youtube videos without
> issues.
>
> 5.7V - 5V LED is off,  but turns on when drawing  ~1A. HDMI working
> appropriately.
>
> 5.8V - Same as 5.7V
>
> 5.9V - 5V LED is off,  but turns on when drawing  ~1A. oddly the
> 1024x768 bug appears again at this voltage. powered off a few times
> to confirm it.
>
> 6.0V - 5V LED is only displays as on with current draw is ~1.4A. Seems
> stable otherwise.
>
> 6.2V - 5V LED is only blinked a few times, when the current draw
> briefly spiked about 1.6A. seems just as stable.
>
> 6.3V - 5V LED off completely. No noticeable blinks. appears stable.
>
>
> On Mon, Sep 19, 2016 at 12:06 PM, Tony Lindgren <tony@atomide.com>
> wrote:
>
> > * H. Nikolaus Schaller <hns@goldelico.com> [160919 02:55]:
> > > > Am 19.09.2016 um 11:39 schrieb Grazvydas Ignotas
> > > > <notasas@gmail.com>: I could give it
> > > > a try on my uEVM to add another data point. FWIW my uEVM has
> > > > been always rock stable (12V supply), but I haven't updated my
> > > > kernel for a while.
> > >
> > > Yes, would be nice to compare your results and observations.
> >
> > My omap5-uevm is on a 5V power supply right now it seems, I'm
> > pretty sure it used to have 12V supply earlier.
> >
> > Regards,
> >
> > Tony
> > _______________________________________________
> > Kernel mailing list
> > Kernel@pyra-handheld.com
> > http://pyra-handheld.com/cgi-bin/mailman/listinfo/kernel
> >

--
Mit freundlichen Grüßen,

Michael Mrozek

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