On 3 July 2013 15:42, James Tunnicliffe <james.tunnicli...@linaro.org>wrote:
> I believe that in the LAVA lab there are a few pandas with USB keys > that are used for builds to try and overcome some reliability > problems. I'm using USB drives for that reason. Is running at 100% of the thermal limit really an issue? Isn't the > point that it is the limit, which itself should have some safety built > in? I don't know off hand if the OMAP 4 SoCs incorporate hardware > frequency limiting or if it is entirely software, in which case the > kernel frequency governor should (at a guess) be throttling back. > That's what I thought, but apparently, both Panda and Panda ES on current Linaro Ubuntu 13.03 fail randomly with USB drives (SSD or HDD) after a few hours under constant load. That means it's impossible for me to use them for toolchain testing at all. Arndales have also given up after a few hours, though after the errata kernel patches it was a bit better. The only board that hasn't failed yet is the Chromebook, which has clocked a solid 5-month period under intense load. Guess what? The Chromebook's A15, which is identical to the Arndale's, has a massive heat-sink almost the size of the laptop itself. I did have a panda give up on me about a year ago. It wasn't being > worked hard, but did refuse to get through a boot most of the time (it > did power on and get part way through booting). Those boards aren't > designed for high reliability and it may be that you just need to get > a couple of replacements. > I have tried 5 different Pandas and all of them fail the same way. I don't think it's a matter of replacing the defective, but of trying a new board altogether... cheers, --renato
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