The following reply was made to PR amd64/171355; it has been noted by GNATS.
From: Alexander Motin <m...@freebsd.org> To: Stefano Marinelli <stef...@dragas.it> Cc: atti...@freebsd.org, bug-follo...@freebsd.org Subject: Re: amd64/171355: FreeBSD 9.1rc1 (and 10-HEAD) not booting on HP Pavilion g6 2147sl Date: Sun, 09 Sep 2012 23:22:39 +0300 On 09.09.2012 23:17, Stefano Marinelli wrote: >> There could be other factors except CPU. For example, GPU, screen >> backlight, disks, etc. Without having proper video driver for AMD GPUs it >> is difficult to predict its power consumption. Also you may look on this >> page: http://wiki.freebsd.org/TuningPowerConsumption . It was written some >> time ago and mostly for Intel, but hopefully better then nothing. Unluckily >> I have no experience with AMD laptops. > > Actually I think it's a matter of GPU. On Linux, I can use the proprietary > drivers. On (PC|Free)BSD, I am using the VESA XOrg driver. > The link you gave me allowed me, some time ago, to lower my netbook power > consumption, going even lower than Linux. > > The machine is compiling the patched kernel now. I will try to reboot it as > soon as finished. That patch should just block HPET to allow booting without tunables. Thanks for testing the patch, but that is not so interesting from practical side. What I would try to do after that is switch HPET into legacy_route mode that was known to work on previous AMDs: hint.hpet.0.legacy_route=1 hint.attimer.0.clock=0 hint.atrtc.0.clock=0 AFAIK, that is what Linux uses by default when it uses HPET. -- Alexander Motin _______________________________________________ freebsd-amd64@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-amd64 To unsubscribe, send any mail to "freebsd-amd64-unsubscr...@freebsd.org"
