Hi, On 04/07/2014 10:54 PM, Olliver Schinagl wrote: > On 04/02/2014 10:31 AM, Hans de Goede wrote: >> Hi, >> >> On 04/01/2014 10:45 PM, Olliver Schinagl wrote: >>> Top Posting! >>> >>> I found the culprit. FAST_MBUS breaks it. After 48 hours of runs, enabling >>> fast_mbus immediately breaks it even after boot. >>> >>> Jens and Emilio hinted that the 3.4 driver reads the FEX file for the >>> voltage. So the higher freq. runs at a lower voltage and that may cause it. >> >> That is an interesting theory, which should be easy to verify. When you've >> some >> time can you edit the fex file and change dcdc3_vol to 1300 in there, >> generate a >> new script.bin and give that a try with a u-boot with FAST_MBUS enabled ? >> >>> So I'll run without fast mbus for now, and it's stable again. Rock Solid if >>> I may. >>> >>> Sorry for all the noise :( >> >> No need to be sorry this is very valuable info! Either we need to revert >> FAST_MBUS >> support or update dcdc3_vol in all fex files for boards which have FAST_MBUS >> set. > I did change the dcdc3_voltage in the fex files, but it didn't change a thing > unfortunately. I think I only mentioned that on IRC ... > > So my board seems to dislike FAST_MBUS. The only thing I want to try in a > while, is bumping the voltage even more, 1.35V or 1.4V
So maybe we should disable FAST_MBUS by default then, at least on the cubietruck? IMHO stability is much more important then squeezing out the last bits of performance. Regards, Hans -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
