NUTsTUN's questions

I'm having a memory leak issue with Xorg and it's taking up huge portions on my memory. Right now, it's up to 41.2% of memory and I haven't even been using the computer that much.

This is some output regarding it.

    Linux grant-N501VW 4.15.0-29-generic #31-Ubuntu SMP Tue Jul 17 15:39:52 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

root      1402  0.0  0.6 400860 99080 tty1     Sl+  Jul29   0:03 /usr/lib/xorg/Xorg vt1 -displayfd 3 -auth /run/user/120/gdm/Xauthority -background none -noreset -keeptty -verbose 3
root      2097  0.0 34.4 6136080 5608064 tty2  Sl+  Jul29   4:26 /usr/lib/xorg/Xorg vt2 -displayfd 3 -auth /run/user/1000/gdm/Xauthority -background none -noreset -keeptty -verbose 3
grant    23603  0.0  0.0  21536  1096 pts/0    S+   23:11   0:00 grep --color=auto xorg

          total        used        free      shared  buff/cache   available
Mem:          15903        7914        5325         352        2663        7450
Swap:           716           0         716

All drivers are updated as well. Restarting will reset the memory usage but it still creeps up over time.

I have an Asus Zenbook Pro UX501VW running Windows 10 and Ubuntu 16.04 LTS on dual boot. Whenever I have headphones plugged in, there is a high pitch white noise that comes through. This noise is not there for Windows 10. I've tried disabling Intel power save and muting the mic input through system settings and alsamixer. Even if I disable all system sound the noise is still there.

System info: 4.6.0-040600-generic x86_64 GNU/Linux
        HDA-Intel - HDA Intel PCH
        HDA Intel PCH at 0xdd428000 irq 137