Late to the party here.. but 4.14 appears to have the correct workarounds for x299.. testing with an x7900 chip, this is the sort of message you want to see to show the calibration is correct:
[ 3.425243] tsc: Refined TSC clocksource calibration: 3312.001 MHz
I believe it was these 2 patches:
> 341102c3ef29 ("x86/tsc: Add option that TSC on Socket 0 being non-zero is valid")
> 41e7864ab5ce ("x86/tsc: Drastically reduce the number of firmware bug warnings")
so 4.12 should work, 4.14 should remove log spam
bivouac0 wrote:
I have this issue with my ASUS X299-A Prime and i9-7940x. Due to this, my RTC clock drifts about 4% which causes VLC to output audio with silences inserted every few seconds. I found a small Linux utility called "adjtimex" that will automatically calibrate the kernel RTC clock params so the clock is accurate. I posted instructions for using this at... https://askubuntu.com/questions/982882/audio-glitches-every-few-seconds-with-vlc-and-the-alc1220-cod...
It looks like the kernel folks are aware of this issue. There is a bug posted on Bugzilla that identifies the root cause a a spread-spectrum clock chip. See https://bugzilla.kernel.org/show_bug.cgi?id=197299
