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wirkzeit
n00b
Joined: 29 Mar 2015
Posts: 9
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 Posted: Thu Jun 14, 2018 2:47 pm Post subject: Wrong systemtime in DATE, HWCLOCK is OK ! |
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Hello, sorry for my english  ...
I test 3 days with a crazy problem...
I work on console with a Gentoo stage3 archive. All OK, but ...
when i start the system and make a date on console, the time is correct, the same in hwclock.
After 1 Minute, date have a time difference in the past (~10 seconds)
After 3 Minutes 1 have ~1 minute difference to hwclock
After 4 hours, i have a difference from 1/2 hour ...
When the system comes up, the Softwareclock is to slow ...
crazy to slow 
I have NO /etc/adjust file !!!
I have study the ArchWiki and Gentoo RTC FAQ .. no change .. date is to slow ...
I install the system via chroot.
Any idea ?
Thank you Gentoo-Gods from west germany
Thorsten |
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eccerr0r
Watchman
Joined: 01 Jul 2004
Posts: 9677
Location: almost Mile High in the USA
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| Posted: Thu Jun 14, 2018 4:26 pm Post subject: |
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This is a kernel timekeeping issue, instead of a RTC issue. Likely the kernel picked a clock source that is unstable.
What do the kernel setting files
| Code: | # cat /sys/devices/system/clocksource/clocksource0/current_clocksource
tsc
# cat /sys/devices/system/clocksource/clocksource0/available_clocksource
tsc hpet acpi_pm
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contain?
You may try the other ones in "available_clocksource" by
| Code: | | # echo acpi_pm > /sys/devices/system/clocksource/clocksource0/current_clocksource |
to see if it works any better. If you don't see any other options, you may need to edit your kernel options to enable them...
_________________
Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching? |
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wirkzeit
n00b
Joined: 29 Mar 2015
Posts: 9
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| Posted: Fri Jun 15, 2018 4:32 pm Post subject: Solved APIC was the problem |
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Thank you for you response ...
With your help, i find the right path after 4 days working on this problem ...
It is a problem with my Gigabyte Board an the AMD Phenom II Prozessor ... (i think)
When i give the Boot Parameter disableapic in grub. The clock is right !!!
Same with: no_timer_check
APICs
apic Use IO-APIC. Default
noapic Don't use the IO-APIC.
disableapic Don't use the local APIC
nolapic Don't use the local APIC (alias for i386 compatibility)
pirq=... See Documentation/x86/i386/IO-APIC.txt
noapictimer Don't set up the APIC timer
no_timer_check Don't check the IO-APIC timer. This can work around
problems with incorrect timer initialization on some boards.
apicpmtimer
Do APIC timer calibration using the pmtimer. Implies
apicmaintimer. Useful when your PIT timer is totally
broken.
I found this on Kernel.org for AMD CPUs...
Thank you for your help and greetings to you!
Thorsten |
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