I am currently running Ubuntu 14.04 an an 2015 DELL XPS (Developer Edition) and dealing with Speed-Issues, stumbled upon some strage behaviour regarding CPU-Speed. It seems, the CPU-frequency is never higher than 1100 MHz. Using "indicator-cpufreq" It shows possibly available speeds up to 2.2 GHz, but I can only choose up to 1.1 GHz. Same with command-line information:
lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) pro Kern: 2
Kern(e) pro Socket: 2
Socket(s): 1
NUMA-Knoten: 1
Anbieterkennung: GenuineIntel
Prozessorfamilie: 6
Modell: 61
Stepping: 4
CPU MHz: 1100.000
BogoMIPS: 4389.76
Virtualisierung: VT-x
L1d Cache: 32K
L1i Cache: 32K
L2 Cache: 256K
L3 Cache: 3072K
NUMA node0 CPU(s): 0-3
cat /proc/cpuinfo |grep MHz
MHz : 1100.000
cpu MHz : 1100.000
cpu MHz : 1100.000
cpu MHz : 1100.000
Any idea what could be wrong? I was waiting for the next LTS. Could an update to 15.04 solve the problem? Thanks :)
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver
andcat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
. And as previous comment asked, does the CPU frequency go up if you load down the CPUs?sudo su
) do:for file in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do echo "ondemand" > $file; done