27 Şub 2007 Sal tarihinde, Adrian Bunk şunları yazmıştı: 

This email lists some known regressions in 2.6.21-rc1 compared to 2.6.20
that are not yet fixed in Linus' tree.

If you find your name in the Cc header, you are either submitter of one
of the bugs, maintainer of an affectected subsystem or driver, a patch
of you caused a breakage or I'm considering you in any other way possibly
involved with one or more of these issues.

...

Subject    : ACPI update breaks kpowersave
References : http://lkml.org/lkml/2007/2/10/7
Submitter  : Ismail Dönmez [off-list ref]
             Fabio Comolli [off-list ref]
Status     : unknown

That regression fixed by c2b6705b75d9c7aff98a4602a32230639e10891c according to 
İsmail [1] 

[1] http://lkml.org/lkml/2007/2/13/105
-- 
S.Çağlar Onur [off-list ref]
http://cekirdek.pardus.org.tr/~caglar/

Linux is like living in a teepee. No Windows, no Gates and an Apache in house!