On Sat 24 August 2013 14:22:55 Radek Polak wrote: > 1/ poor power management [...] > something. But i always worked in userspace. I barely understand kernel and > i have no EE skills and equipment to contribute. I can contribute only as > a tester. I thought that i will deliver working userspace and IMO QtMoko > is very good at it. But without working kernel and HW there is not much > point to improve it.
many thanks for this contribution, it's already a better help than much of the discussion about what's wrong with our community and the GTA04 project at large. However one remark about it: it's not that simple to blame kernel for poor power management. What we learned from last maybe 6 years of different OM distros and from maemo and mer and nitdroid etc is: poor power management is way too often caused by userland, like sensorfw and WLAN connection manager and X11/windowmanager and audio (alsa/PA) and whatnot else. Often it's even rogue apps that do silly stuff like updating their system status icon 25 times per second or constantly chatting with internet or even just polling files when you should use inotify instead. Kernel power saving measures are relatively simple to test and fix, and usually it's not kernel to blame for abysmal standby time and/or operation time. To give you a simple example: on N900 maemo you have "scanning period" in settings-internet, which makes device scan for WLAN APs only every 5, 10, ... even 30 min. This is needed since the WLAN chip cuts thru the battery in less than 3 hours when you constantly scan for APs. Clearly a userland issue where kernel can't do much. Now you can start to blame kernel WLAN driver for not doing proper powersaving but that won't help establish a decently working usable OS on N900. cheers jOERG -- () ascii ribbon campaign - against html e-mail /\ www.asciiribbon.org - against proprietary attachments (alas the above page got scrapped due to resignation(!!), so here some supplementary links:) http://www.georgedillon.com/web/html_email_is_evil.shtml http://www.nonhtmlmail.org/campaign.html http://www.georgedillon.com/web/html_email_is_evil_still.shtml http://www.gerstbach.at/2004/ascii/ (German)
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