History of TroubleShooting

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Difference (from prior major revision) (minor diff, author diff)

Added: 114a115,118

Enabling ACPI could be the only way to get access to local APIC timer (much lower latency than PIC), as new mainboards do not come with
legacy support of MPTABLEs.
Disable C1E power-saving feature in BIOS (could save about ~10-15ms on recent CPUs), this feature is activated regardless of
ACPI or APM, thus needs to be disabled independently.

Changed: 225,226c229,241

1. USB thumb drive fat corrupted

I fixed 'unexpected realtime delays' caused by a USB thumb drive
the error was repeatable during 3 reboots
dmesg showed no problems
but messages reported that when the thumb was mounted , there were errors detected and suggested running e2fsck
now this thumb had 2 partitions, one was ext2 , the other was vfat
so i ran e2fsck on the ext2, then inspected (didnt change) the vfat paritition
i used fsck.vfat to look, just didnt let it change things
(reason, some old memory of 'always let the native OS fix drive errors )
then i let Vista check & repair the vfat partition
now, i can mount and unmount the device, read & write to it, play music off it, read pdfs off it
and no UDR's (no unexpected realtime delays)
tom3p 11jan2010

Published under a Creative Commons License

	Revision 39 . . (edit) January 11, 2010 1:56 pm by adsl-75-4-36-65.dsl.emhril.sbcglobal.net
	Revision 38 . . February 22, 2009 12:52 pm by Aystarik [ACPI is not that bad. C1E is.]
	Revision 37 . . February 9, 2009 12:07 pm by Fenn [links to RealTime page]
	Revision 36 . . (edit) September 23, 2008 8:53 am by Alex Joni [added hint towards cleaning out the hardy/kernel confusion]