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#1 2014-07-11 17:09:19

Potomac
Member
Registered: 2011-12-25
Posts: 343

[linux] "Fast TSC calibration failed" warning message with 3.15.5-1

after upgrading to linux 3.15.5-1 I notice a warning message on boot after rebooting :

"Fast TSC calibration failed"

it's a random bug, sometimes this warning message is not diplayed,

before upgrading to linux 3.15.5-1 I never saw this message on my PC ( pentium dual-core E6800, chipset intel P31, archlinux 64 bits ), the only time where I can see this message it's on a virtualbox machine ( archlinux 32 bits ),

Do you have notice the same warning message ?

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#2 2014-07-11 17:20:12

WonderWoofy
Member
From: Los Gatos, CA
Registered: 2012-05-19
Posts: 8,412

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#3 2014-07-11 17:33:11

Potomac
Member
Registered: 2011-12-25
Posts: 343

Re: [linux] "Fast TSC calibration failed" warning message with 3.15.5-1

I already saw these pages,

all I want is to know if others archlinux users have noticed the same warning message with the new kernel 3.15.5-1, if it's a regression,

because with 3.15.4 I don't have this warning message

Last edited by Potomac (2014-07-11 17:34:16)

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#4 2014-07-12 01:49:13

Scimmia
Bug Wrangler
Registered: 2012-09-01
Posts: 5,119

Re: [linux] "Fast TSC calibration failed" warning message with 3.15.5-1

I've been noticing it for years now. It's certainly nothing new with 3.15.5.

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#5 2014-12-05 21:41:52

mcloaked
Member
From: Yorkshire, UK
Registered: 2012-02-02
Posts: 728

Re: [linux] "Fast TSC calibration failed" warning message with 3.15.5-1

I had been noticing the fast tsc calibration failed message at boot for quite a long time on my old Samsung Q35 which is a BIOS boot netbook with arch running the x86 system. The message has continued to show up through many kernel updates including 3.17.4-1-ARCH.

After doing a bit of research I found a simple solution to getting rid of this warning during boot. In my case I use grub as the bootloader and that is where a workaround is possible.

I edited the following two lines in /etc/default/grub to add in "clocksource=tsc":

GRUB_CMDLINE_LINUX_DEFAULT="quiet clocksource=tsc"
GRUB_CMDLINE_LINUX="clocksource=tsc"

Then regenerated the grub.cfg file with:

grub-mkconfig -o /boot/grub/grub.cfg

After rebooting the machine the tsc calibration warning no longer appears.  Presumably similar workarounds are available for other bootloaders also.

Hope this may help even though I only discovered this workaround 5 months after this thread had its last post!

Last edited by mcloaked (2014-12-05 21:42:27)


Mike C

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