* Pavel Machek <pavel@xxxxxx> [160412 05:31]: > Hi! > > > > > Ok, it works now. I was doing tests in daylight so it was poorly > > > > visible. The right part of keyboard stays lit (but that's expected > > > > AFAICT), but the left part blinks. > > > > > > During idle, both should go off and are doing so for me. Both LEDs off > > > indicates off mode, left LED off is for retention mode. So you still > > > have something blocking off mode, maybe check: > > > > > > echo 1 > /sys/kernel/debug/pm_debug/enable_off_mode > > > > What is the power difference between retention and off? I'm now down > > to cca 25mA, which should be around 50 hours standby time. Not ideal, > > but should be usable. The 25mA sounds way too big to me even for retention mode, some devices must be still on. The off mode makes a huge difference for standby time, it should cut down the total power consumption to something like 10+ mW with modem enabled. Aproximately the breakdown is roughly: 900 uW for omap, 5 mW for memory and 5 or more for the modem. Sorry I don't know the exact numbers for the modem. But with 37xx torpedo, mainline kernel is already getting very close to the 900 uW + 5 mW numbers for the CPU module during idle measured from the ina219 shunt on the torpedo devkit. > > In the meantime, I found what is causing the rention mode to break for > > me: CONFIG_HSI (aka wireless modem support). With HSI off, it seems to work. > > > > I still get problems with the camera button, in config similar to > > defconfig. For some reason, I'm even getting (autorepeating) ^@ on > > console. As long as I hold camera button down, I even get it into off > > mode for brief period. > > Ok, if I turn off CONFIG_KEYBOARD_GPIO, I get it into off > mode... once per screen blank, for about a second. (Does CONFIG_KEYBOARD_GPIO also cause > problems for you?) > > Any idea why it enters off mode only once after each screenblank? After disabling CONFIG_PROVE_LOCKING, loading the LCD modules, and blanking the screen, my n900 hits off mode just fine about once a second. Sounds like you still have some extra devices enabled causing it. With LCD enabled, both LEDs are on contantly. I think we should be able to hit retention in that state, at least n950 is doing it with the Nokia kernel. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
