Current clocksource is hpet, which simply does not work with the applications I am trying to run and acpi\_pm gives the same errors. I need TSC to work. I already disabled intel\_pstate and set failover to acpi\_pm. What else can I try to make TSC work again?

```
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.083468] TSC deadline timer enabled
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.083475] Performance Events: PEBS fmt1+, 16-deep LBR, SandyBridge events, full-width counters, Intel PMU driver.
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.083778] ... version:                3
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.083838] ... bit width:              48
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.083900] ... generic registers:      4
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.083961] ... value mask:             0000ffffffffffff
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.084023] ... max period:             0000ffffffffffff
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.084086] ... fixed-purpose events:   3
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.084146] ... event mask:             000000070000000f
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.085580] x86: Booting SMP configuration:
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.085642] .... node  #0, CPUs:        #1
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.099367] TSC synchronization [CPU#0 -> CPU#1]:
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.099489] Measured 493618680 cycles TSC warp between CPUs, turning off TSC clock.
May  4 17:49:18 Ubuntu-1404-trusty-64-minimal kernel: [    0.008000] tsc: Marking TSC unstable due to check_tsc_sync_source failed

```