Another possibility is IRQ problems. Powertop should help determine how your interrupts are working.
Here's mine:
Here's mine:
Code:
226 wakeups/second 0.8 ms/s 61.2 Timer tick_sched_timer 15.8 ms/s 24.8 Process /usr/bin/ksysguard 128.4 µs/s 19.3 kWork ieee80211_iface_work 3.6 ms/s 10.3 Process /usr/bin/X :0 vt7 -br -nolisten tcp -aut 1.4 ms/s 9.8 Process dbus-daemon --system --fork --activation 278.7 µs/s 10.0 Process /usr/sbin/bumblebeed --use-syslog 95.2 µs/s 8.3 Process [rtsx-polling] 197.8 µs/s 7.7 Timer hrtimer_wakeup 1.1 ms/s 7.1 Process kwin -session 101b7188189177000134408930 2.3 ms/s 6.2 Process /usr/bin/python -O /usr/share/wicd/daemo 6.3 ms/s 4.1 Process ksysguardd 0.9 ms/s 5.9 Interrupt [6] tasklet(softirq) 144.6 µs/s 4.8 Process [ksoftirqd/4] 0.9 ms/s 4.3 Process /usr/bin/python -O /usr/share/wicd/daemo 1.7 ms/s 2.7 Process /usr/bin/plasma-desktop 378.4 µs/s 2.4 Process /usr/bin/konsole 186.9 µs/s 2.2 Process /usr/sbin/mysqld --defaults-file=/home/j 84.4 µs/s 2.0 Process /usr/lib/chromium-browser/chromium-brows 1.9 ms/s 1.2 Process wicd
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