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