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<p>Hi Ard</p>
<p><br>
</p>
<p>So, I get about a 50% success rate on booting the board, taken from a sample of 12 boots, with 6 successful and 6 failed boots. All conducted with the 16-1 riser with external power.</p>
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<p>Seems to always fail in about the same place. I have attached boot logs from one successful, one full failure and 5 tails of the failed boot, hopefully this will shed some light on whats happening?</p>
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<p>I am using a pre-release uboot - I have one of the early hardware batches - could this be contributing to the problem?</p>
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<p>/Matt</p>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Ard Biesheuvel <ard.biesheuvel@linaro.org><br>
<b>Sent:</b> 05 June 2017 13:19:31<br>
<b>To:</b> Matt Spencer<br>
<b>Cc:</b> Leif Lindholm; Wookey; Steve Capper; Steve McIntyre; macchiato@lists.einval.com<br>
<b>Subject:</b> Re: MacchiatoBin GPU progress [#freetimeproject]</font>
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<div class="PlainText">On 5 June 2017 at 12:17, Matt Spencer <Matt.Spencer@arm.com> wrote:<br>
> My card does seem to be detected every boot - although I have not rebooted a<br>
> large number of times with the card in yet (maybe 5 or so?). I can power<br>
> cycle it to see what the detection rates are like if that would help?<br>
><br>
<br>
Yes, please. Could you try it with the riser power disconnected as well please?<br>
<br>
><br>
> My 16->1 riser card is powered, as I didn't want to assume that the<br>
> motherboard would be configured to power a GPU - they can be hungry beasts!<br>
><br>
<br>
True.<br>
<br>
><br>
> This is the riser that I am using:<br>
> <a href="https://www.amazon.co.uk/gp/product/B01ER2Z1GY/ref=oh_aui_detailpage_o07_s00">
https://www.amazon.co.uk/gp/product/B01ER2Z1GY/ref=oh_aui_detailpage_o07_s00</a><br>
><br>
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