CentOS 7.2 - Fast TSC calibration failed.

Dear All,

I have downloaded CentOS 7.2.1511 DVD and tried to install it on a new
laptop that comes with an Intel i7 6th generation processor and don't
matter which option I use (install, test media or troubleshooting); I get
the following error:

[ 0.000000] tsc: Fast TSC calibration failed
[ 0.321345] pnp 00:0d: can't evaluate _CRS: 1

At this time I am not able to use any keys on the keyboard; therefore, the
only option I have is to power the laptop off. The laptop specifications
are as follow:

Processor : Intel Core i7-6700HQ 2.6GHz (Turbo up to 3.5GHz) Skylake
Graphics Coprocessor : NVIDIA GTX960M 2GB GDDR5
Chipset Brand : Intel

I waited for CentOS 7.2 because I saw that upstream had [0] "the
'intel_idle' and 'pstate' driver updated to support 6th Generation Intel
Core processor". Shall I file a bug for this or will I need to create a ISO
with an customised kernel or use one of ElRepo's 'lt' or 'ml' kernels which
will include support for the new hardware.

The full specification of the laptop can be found here [1]

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[1] <a href="" title=""></a>


Re: CentOS 7.2 - Fast TSC calibration failed.

By Steven Tardy at 12/18/2015 - 23:18

TSC is a high accuracy CPU clock. TSC can fail due to motherboard hardware fault on multi processor servers. But the kernel usually fails back to the less accurate default hpet clock.

Do other versions/kernels work fine? Does RHEL 7.2 work?

Re: CentOS 7.2 - Fast TSC calibration failed.

By Earl Ramirez at 12/18/2015 - 23:58

Hello Steven,

Thanks for the information; I'm currently downloading RHEL 7.2 so will if
that a try and report back, I 'assume' that the hardware may be too new
because I am getting the following error when I try to use Fedora 23 live
workstation. The error is "time out waiting for CPU 0".

Will see if I can make any adjustments in the BIOS and try again.