Mark Hellman wrote: > Why isn't DISK_STANDBY_MODE set to 'powersave' or 'agressiv_powersave' by > default on Powersave scheme?
because at least one machine (which i was using at that time - a Dell Latitude D600) locked up hard sometimes, at the moment the Disk would have to spin up again. This was never fully debugged (it is not easy - it really locked up hard) but code analysis suggested that it might be a hardware (chipset) flaw, not a kernel bug. Also, the logic to "first check the capabilities of the disk, then only set AAM / APM if it is available" was not in place then, so every scheme change (and boot) threw lots of "drive ready, seek complete" messages into syslog on machines with drives that did not support it (AAM is getting less popular these days, it seems). We decided that per default, we do not touch the disk but let the user decide. We might rethink that decision, thanks for reminding :-) 'powersave' should be harmless, now that we check for drive capabilities first. I also want to decouple the "set laptop mode" setting from the actual "do some hdparm powersaving stuff" setting, so i can set a moderate powersaving mode even on line power but without setting laptop mode with its potential performance and data integrity drawbacks. -- Stefan Seyfried \ "I didn't want to write for pay. I QA / R&D Team Mobile Devices \ wanted to be paid for what I write." SUSE LINUX Products GmbH, Nürnberg \ -- Leonard Cohen _______________________________________________ powersave-devel mailing list [email protected] http://forge.novell.com/mailman/listinfo/powersave-devel
