Same problem with Ubuntu MATE 18.04:
[ 2.944434] clocksource: Switched to clocksource tsc
[ 34.522308] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
$ uname -r
4.15.0-20-generic
My motherboard:
producto: P7H55
fabricante: ASUSTeK Computer INC.
Same problem with Ubuntu MATE 18.04:
[ 2.944434] clocksource: Switched to clocksource tsc
[ 34.522308] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
$ uname -r
4.15.0-20-generic
My motherboard:
producto: P7H55
fabricante: ASUSTeK Computer INC.
Also with two SSDs (no mechanical).