Thread: [Announce] CSSU Testing thread
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misiak is offline misiak
2013-08-25 , 20:19
Posts: 805 | Thanked: 1,605 times | Joined on Feb 2010 @ Gdynia, Poland
#1504
Originally Posted by tanago View Post
So, after much investigating, the root of the High IRQ usage turned out to be kernel-power-settings package, no matter if I have loaded default or my custom oc/undervolt profile...Uninstalling it lowered IRQ usage. Also some daemons like openntpd and advanced power monitor rise up IRQ usage. But still i2c_omap is producing like ~200 activities(170 at the best scenario) and yours is ~90. When I reflashed the device the first thing I did is check i2c_omap IRQ and it was ~130. How come yours is 90? How can I trace it furthermore? Can it be hardware issue?
I will repeat my unaswered questions from last page, which can be helpful (albeit more appropriate in kernel-power thread from now on) Do you have u-boot installed (I think loading kernel via u-boot is different than doing it using nolo)? And which hardware revision of N900 do you have? I remember from u-boot thread few months ago that one revision was different (some memory was split in half under two addresses or something) and this one revision behaved differently when booting via u-boot (afair it could not boot at all, but don't quote me on that). Maybe the combination of u-boot and your hw revision is causing differences in powertop? (just a really wild guess again)
 

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