Here's my friend's laptop configuration:Linux Mint & Windows 8.1Intel Core i7-3537UNVIDIA Kepler GeForce GT 740M & Intel HD 40004Go RAMAll the drivers are up to dateHere's the issues:The processor is 60C in idle;The battery long for only 1h30 instead of at least 3 hours with Windows 8.1What I've done:Try the 3 proposed drivers => didn't change the battery life;Search for greedy applications with top => the CPU load do not exceed 5%.Here's powertop result:Usage       vnements/s    Catgorie       Description100,0%                      Device         Codec audio hwC0D0 : Realtek 16,0 ms/s      62,6        Process        /usr/bin/X :0 -audit 0 -auth /var/lib/mdm/:0.Xauth -nolisten tcp vt8 18,4 ms/s      55,8        Process        /opt/google/chrome/chrome --type=renderer --enable-deferred-image-decod 11,6 ms/s      56,7        Process        /opt/google/chrome/chrome 14,7 ms/s      31,3        Process        cinnamon --replace265,0 s/s      25,4        kWork          od_dbs_timer511,2 s/s      22,5        Interrupt      [4] block(softirq)  1,0 ms/s      15,7        Process        /usr/sbin/mysqld  2,0 ms/s      10,8        Timer          hrtimer_wakeup  5,7 ms/s       7,8        Process        gnome-terminal181,0 s/s       9,8        kWork          ieee80211_iface_work 90,3 s/s       7,8        Process        [rcu_sched]276,8 s/s       5,9        kWork          os_execute_work_item469,3 s/s       3,9        Process        /opt/google/chrome/chrome --type=gpu-process --channel=2623.0.147618803  4,3 ms/s       2,0        Process        powertop  2,6 ms/s       2,0        Interrupt      [6] tasklet(softirq)467,3 s/s       1,0        Timer          tick_sched_timer270,8 s/s       1,0        Interrupt      [7] sched(softirq) 93,1 s/s       1,0        Process        /usr/lib/accountsservice/accounts-daemon 50,3 s/s       1,0        Process        /usr/sbin/apache2 -k start 45,3 s/s       1,0        Process        [khugepaged]  8,5 s/s       1,0        kWork          ath_tx_complete_poll_work  2,8 s/s       1,0        kWork          flush_to_ldisc  0,0 s/s       1,0        kWork          bdi_writeback_workfn  0,8 ms/s      0,00        Process        [kworker/u8:7]  0,8 ms/s      0,00        Interrupt      [50] nvidiaQuestions:Is the dedicated graphic card draining the battery? If so, how can I choose the enabled GC?What (else) can I check?
Mint battery hogger
linux mint;battery;optimus