From: Ow M. H. <ow....@wd...> - 2004-03-11 08:16:57
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> -----Original Message----- > From: Len Brown [mailto:len...@in...] > Sent: Thursday, March 11, 2004 3:15 PM > To: Ow Mun Heng > Cc: Acpi-List (E-mail) > Subject: RE: [ACPI] "TSC cannot be used as a timesource" when=20 > on battery >=20 >=20 > Does /proc/acpi/processor/CPU0/power show any usage in C3? On 2.6.3 kernel, (vanilla or acpi patched or..) C3 Usage is quite Good. More than C2 (even on battery) only when i put in=20 the usb or access the HD agressively (loading/reading/writing=20 large files, will it get fffffff) =20 > I believe there is a bugfix in the pipeline regarding local APIC timer > slowing down in C3. =20 Frankly, running on C3 or C2 doesn't really make a difference for my=20 D600 laptop. (i initially thought it would help increase batt life.=20 No Luck there.) So.. Should I try apic=3Doff when running on battery? I've not tried=20 that since it's sparodic. sometimes bootup got, sometimes none. > The fix is to disable C3 -- the workaround is to > use another timer. ACPI PM Timer?? Is that where we're heading.. >=20 > cheers, > -Len Thanks. Sincerely appreciate it. Ow PS : I really want to know what's your/list preference. Reply to List=20 or reply to all. Since if reply to all, then subcribers will get 2 = copies=20 of the same email. (which is not so nice..) >=20 >=20 > On Thu, 2004-03-11 at 00:21, Ow Mun Heng wrote: > > > -----Original Message----- > > > From: Ow Mun Heng=20 > > > Sent: Monday, March 01, 2004 10:39 AM > > > To: Acpi-List (E-mail) > > > Subject: [ACPI] "TSC cannot be used as a timesource" when=20 > on battery > > >=20 > > >=20 > > > Hi All, > > >=20 > > > D600 + RH9 + kernel 2.6.3+acpi20040211 > > >=20 > > > Was seeing these error messages when booting from battery.=20 > > > I've searched through google and the only thing It came up with=20 > > > was a reference that asks to use ACPI PM as the timesource. > > >=20 > > > I'm currently using RTC (real time clock) > > >=20 > > > I'm still trying to figure out what is the difference=20 > between ACPI=20 > > > PM timesource/RTC. > > >=20 > > > I've not investigated further to determine if my clock is indeed=20 > > > running slower.=20 > > >=20 > > > =3D=3D=3D=3Dstart kernel message=3D=3D=3D=3D=3D=3D=3D > > > TSC cannot be used as a timesource. > > > <4> Possible reasons for this are > > > You're running with speedstep > > > You don't have DMA enabled for your hard drive (See hdparm) > > > Incorrect TSC synchronization on an SMP system (dee dmesg) > > > Falling back to sane timesource now. > > > =3D=3D=3D=3D=3D=3D=3Dend kernel = messages=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > > >=20 > > > HDparm shows all my hd and cdrom are on dma > > > This is uniprocessor laptop > > >=20 > > > Yes.. running on speedstep. > > > When on AC power, I don't see this error. > >=20 > > Sent this to the list a while back.. I've not > > seen any responses. So, asking again, just in case it > > was missed (busy schedules etc) > >=20 > > I don't really think it's an issue.. but still would like=20 > > to know what is triggering it. > >=20 > > Thanks, > > Ow > >=20 > > =20 > >=20 > >=20 > > ------------------------------------------------------- > > This SF.Net email is sponsored by: IBM Linux Tutorials > > Free Linux tutorial presented by Daniel Robbins, President=20 > and CEO of > > GenToo technologies. Learn everything from fundamentals to system > > = administration.http://ads.osdn.com/?ad_id=1470&alloc_id638&op=3Dclick > > _______________________________________________ > > Acpi-devel mailing list > > Acp...@li... > > https://lists.sourceforge.net/lists/listinfo/acpi-devel >=20 >=20 |