> On 10 Feb 2022, at 5:31 am, Kevin Hilman <khilman@xxxxxxxxxxxx> wrote: > > Christian Hewitt <christianshewitt@xxxxxxxxx> writes: > >> Amlogic G12B and SM1 devices experience CPU stalls and random board >> wedges when the system idles and CPU cores clock down to lower opp >> points. Recent vendor kernels include a change to remove 100-250MHz >> (with no explanation) [0] but other downstream sources also remove >> the 500/667MHz points (also with no explanation). Unless 100-667Mhz >> opps are removed or the CPU governor forced to performance, stalls >> are observed, so let's remove them an improve stability/uptime. > > Just curious: what CPUfreq governor do you use by default for the > LibreELEC kernel? LE uses ondemand. One of the original clues on the problem us that the issue isn’t seen in some of the retro-gaming forks on LE's codebase which use the performance governor (and overclocks, etc.) > Your patch greatly improves the stability I'm seeing, but doesn't quite > elimitate it. > > I'm testing suspend/resume in a loop on VIM3, and with schedutil > (default) or ondemand, it eventually hangs. With either powersave or > performance it's stable. > > Kevin
