Re: [Linaro-validation] Overheating Pandas

2013-07-04 Thread Renato Golin
On 4 July 2013 12:58, James Tunnicliffe wrote: > Faster clocks also drink more power - now you are using slower clocks > those boards will be stressing the PSU less. That is true. Though, if memory serves me well, I think I was using one decent power supply and one cheap in the lab, and both Pan

Re: [Linaro-validation] Overheating Pandas

2013-07-04 Thread James Tunnicliffe
On 4 July 2013 12:27, Renato Golin wrote: > On 3 July 2013 18:33, Richard Earnshaw wrote: >> >> keep lowering the clock limit (.../cpufreq/scaling_max_freq) until you get >> stability. If you don't, then it isn't a heating problem. > > > It might be a bit too soon, but I just got a few 7h builds

Re: [Linaro-validation] Overheating Pandas

2013-07-04 Thread Renato Golin
On 4 July 2013 11:29, Mans Rullgard wrote: > That is not how electricity works. > I may not have myself clear, I suppose... We can digress at Connect about electricity. cheers, --renato ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.o

Re: [Linaro-validation] Overheating Pandas

2013-07-04 Thread Mans Rullgard
On 4 July 2013 10:08, Renato Golin wrote: > On 4 July 2013 10:00, Milosz Wasilewski > wrote: >> >> What is the output current of this PSU? I tried running pandaboard >> with 2.5A PSU and it didn't even start. 3A seems to be the minimum. > > These are 5V and on my multimeter I got almost 6V, but i

Re: [Linaro-validation] Overheating Pandas

2013-07-04 Thread Renato Golin
On 4 July 2013 10:01, Matt Hart wrote: > I've just had a quick glance at the rack in LAVA Lab with the pandas in > it, and it seems like we are using the 5V 4A brick style power supplies, > not the cheap ones. > I know, but somewhere in the lab there's a box full of the cheap ones, and these are

Re: [Linaro-validation] Overheating Pandas

2013-07-04 Thread Renato Golin
On 4 July 2013 10:00, Milosz Wasilewski wrote: > What is the output current of this PSU? I tried running pandaboard > with 2.5A PSU and it didn't even start. 3A seems to be the minimum. > These are 5V and on my multimeter I got almost 6V, but it's not just the voltage, but the constant supply of

Re: [Linaro-validation] Overheating Pandas

2013-07-04 Thread Matt Hart
I've just had a quick glance at the rack in LAVA Lab with the pandas in it, and it seems like we are using the 5V 4A brick style power supplies, not the cheap ones. Matt On 4 July 2013 10:00, Milosz Wasilewski wrote: > On 4 July 2013 09:44, Renato Golin wrote: > > On 3 July 2013 23:01, Will Ne

Re: [Linaro-validation] Overheating Pandas

2013-07-04 Thread Milosz Wasilewski
On 4 July 2013 09:44, Renato Golin wrote: > On 3 July 2013 23:01, Will Newton wrote: >> >> It may also be worth examining your power supplies and see if they are >> providing enough current to run the chip this hot reliably. A bench >> supply could eliminate this possibility conclusively. > > > T

Re: [Linaro-validation] Overheating Pandas

2013-07-03 Thread James Tunnicliffe
On 3 July 2013 17:41, Renato Golin wrote: > On 3 July 2013 17:22, Mans Rullgard wrote: >> >> I repeat, the 4460 will run at 1.2GHz indefinitely without thermal >> management. > > > My mistake, I said 1.3GHz when it was actually 1.2GHz. So, at 1.2GHz, it > freezes every few hours on full load on b

Re: [Linaro-validation] Overheating Pandas

2013-07-03 Thread Renato Golin
On 3 July 2013 15:42, James Tunnicliffe 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

Re: [Linaro-validation] Overheating Pandas

2013-07-03 Thread James Tunnicliffe
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. Don't know if it was a temperature problem or something else. With any luck someone who knows more about that issue can speak up and share what they found. You