I have a Dell XPS 15 9570 with Ubuntu 18.04.
When I plug in my headphones I can listen to audio. Everything works fine. Except from the shrill noise I get when I don't play any audio.
Another issue is that, if I leave the headphones plugged in and reboot the laptop, it appears that the headphones don't work, i.e. I cannot listen to any audio. To be able to hear anything I have to unplug and plug in the headphones again.
How to fix these issues?
UPDATE
When I run journalctl --follow and plug in the headphones I get:
Oct 14 18:31:24 xps systemd[1444]: Starting GNOME Terminal Server...
Oct 14 18:31:25 xps dbus-daemon[1718]: [session uid=1000 pid=1718] Successfully activated service 'org.gnome.Terminal'
Oct 14 18:31:25 xps systemd[1444]: Started GNOME Terminal Server.
Oct 14 18:31:55 xps wpa_supplicant[914]: wlp59s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-74 noise=-101 txrate=6000
Oct 14 18:31:57 xps wpa_supplicant[914]: wlp59s0: CTRL-EVENT-SIGNAL-CHANGE above=0 signal=-82 noise=-101 txrate=6000
I then leave the headphones in and reboot.
After I run journalctl -b I get:
Oct 13 14:46:31 xps kernel: Linux version 4.15.0-36-generic (buildd@lgw01-amd64-031) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC 2018 (Ubuntu 4.15.0-36.39-generic 4.15.18)
Oct 13 14:46:31 xps kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-36-generic root=UUID=c02749bd-9e22-473e-8668-62d1fc153ee0 ro quiet splash vt.handoff=1
Oct 13 14:46:31 xps kernel: KERNEL supported cpus:
Oct 13 14:46:31 xps kernel: Intel GenuineIntel
Oct 13 14:46:31 xps kernel: AMD AuthenticAMD
Oct 13 14:46:31 xps kernel: Centaur CentaurHauls
Oct 13 14:46:31 xps kernel: x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
Oct 13 14:46:31 xps kernel: x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
Oct 13 14:46:31 xps kernel: x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
Oct 13 14:46:31 xps kernel: x86/fpu: Supporting XSAVE feature 0x008: 'MPX bounds registers'
Oct 13 14:46:31 xps kernel: x86/fpu: Supporting XSAVE feature 0x010: 'MPX CSR'
Oct 13 14:46:31 xps kernel: x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
Oct 13 14:46:31 xps kernel: x86/fpu: xstate_offset[3]: 832, xstate_sizes[3]: 64
Oct 13 14:46:31 xps kernel: x86/fpu: xstate_offset[4]: 896, xstate_sizes[4]: 64
Oct 13 14:46:31 xps kernel: x86/fpu: Enabled xstate features 0x1f, context size is 960 bytes, using 'compacted' format.
Oct 13 14:46:31 xps kernel: e820: BIOS-provided physical RAM map:
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009dfff] usable
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x000000000009e000-0x000000000009efff] reserved
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x000000000009f000-0x000000000009ffff] usable
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x00000000000a0000-0x00000000000fffff] reserved
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x0000000000100000-0x00000000650ddfff] usable
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x00000000650de000-0x00000000650defff] ACPI NVS
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x00000000650df000-0x00000000650dffff] reserved
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x00000000650e0000-0x000000006c606fff] usable
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x000000006c607000-0x000000006f408fff] reserved
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x000000006f409000-0x000000006f485fff] ACPI data
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x000000006f486000-0x000000006f5b4fff] ACPI NVS
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x000000006f5b5000-0x000000006ff34fff] reserved
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x000000006ff35000-0x000000006fffefff] type 20
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x000000006ffff000-0x000000006fffffff] usable
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x0000000070000000-0x0000000077ffffff] reserved
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x0000000078000000-0x0000000078dfffff] usable
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x0000000078e00000-0x000000007f7fffff] reserved
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x00000000f0000000-0x00000000f7ffffff] reserved
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x00000000fe000000-0x00000000fe010fff] reserved
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] reserved
Oct 13 14:46:31 xps kernel: BIOS-e820: [mem 0x0000000100000000-0x000000087c7fffff] usable
Oct 13 14:46:31 xps kernel: NX (Execute Disable) protection: active
Oct 13 14:46:31 xps kernel: efi: EFI v2.70 by American Megatrends
Oct 13 14:46:31 xps kernel: efi: ACPI 2.0=0x6f422000 ACPI=0x6f422000 SMBIOS=0xf0000 SMBIOS 3.0=0xf0020 ESRT=0x6fc4a118 MEMATTR=0x6a414018
Oct 13 14:46:31 xps kernel: secureboot: Secure boot could not be determined (mode 0)
Oct 13 14:46:31 xps kernel: SMBIOS 3.1.1 present.
Oct 13 14:46:31 xps kernel: DMI: Dell Inc. XPS 15 9570/07GHH0, BIOS 1.5.0 09/03/2018
Oct 13 14:46:31 xps kernel: e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
Oct 13 14:46:31 xps kernel: e820: remove [mem 0x000a0000-0x000fffff] usable
Oct 13 14:46:31 xps kernel: e820: last_pfn = 0x87c800 max_arch_pfn = 0x400000000
Oct 13 14:46:31 xps kernel: MTRR default type: write-back
Oct 13 14:46:31 xps kernel: MTRR fixed ranges enabled:
Oct 13 14:46:31 xps kernel: 00000-9FFFF write-back
Oct 13 14:46:31 xps kernel: A0000-BFFFF uncachable
Oct 13 14:46:31 xps kernel: C0000-FFFFF write-protect
Oct 13 14:46:31 xps kernel: MTRR variable ranges enabled:
Oct 13 14:46:31 xps kernel: 0 base 0080000000 mask 7F80000000 uncachable
The output from suo lsof ... is:
Output information may be incomplete.
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
systemd 1 root 0u CHR 1,3 0t0 6 /dev/null
systemd 1 root 1u CHR 1,3 0t0 6 /dev/null
systemd 1 root 2u CHR 1,3 0t0 6 /dev/null
systemd 1 root 3w CHR 1,11 0t0 12 /dev/kmsg
systemd 1 root 23u CHR 13,67 0t0 152 /dev/input/event3
systemd 1 root 25r CHR 10,235 0t0 393 /dev/autofs
systemd 1 root 107u CHR 226,0 0t0 223 /dev/dri/card0
systemd 1 root 109u CHR 226,0 0t0 223 /dev/dri/card0
systemd 1 root 110u CHR 13,69 0t0 288 /dev/input/event5
systemd 1 root 111u CHR 13,70 0t0 290 /dev/input/event6
systemd 1 root 112u CHR 13,65 0t0 150 /dev/input/event1
systemd 1 root 113u CHR 13,66 0t0 151 /dev/input/event2
systemd 1 root 114u CHR 13,78 0t0 513 /dev/input/event14
systemd 1 root 115u CHR 13,75 0t0 466 /dev/input/event11
systemd 1 root 116u CHR 13,76 0t0 468 /dev/input/event12
systemd 1 root 117u CHR 13,77 0t0 477 /dev/input/event13
systemd 1 root 118u CHR 13,73 0t0 437 /dev/input/event9
systemd 1 root 119u CHR 13,72 0t0 436 /dev/input/event8
systemd 1 root 120u CHR 13,74 0t0 458 /dev/input/event10
systemd 1 root 121u CHR 13,68 0t0 155 /dev/input/event4
systemd 1 root 122u CHR 13,71 0t0 432 /dev/input/event7
kdevtmpfs 79 root cwd DIR 0,6 4460 2 /dev
kdevtmpfs 79 root rtd DIR 0,6 4460 2 /dev
systemd-j 321 root 0r CHR 1,3 0t0 6 /dev/null
systemd-j 321 root 1w CHR 1,3 0t0 6 /dev/null
systemd-j 321 root 2w CHR 1,3 0t0 6 /dev/null
systemd-j 321 root 7w CHR 1,11 0t0 12 /dev/kmsg
systemd-j 321 root 9u CHR 1,11 0t0 12 /dev/kmsg
systemd-u 341 root 0r CHR 1,3 0t0 6 /dev/null
systemd-r 624 systemd-resolve 0r CHR 1,3 0t0 6 /dev/null
systemd-t 625 systemd-timesync 0r CHR 1,3 0t0 6 /dev/null
cupsd 878 root 0r CHR 1,3 0t0 6 /dev/null
rsyslogd 879 syslog 0r CHR 1,3 0t0 6 /dev/null
rsyslogd 879 syslog 1w CHR 1,3 0t0 6 /dev/null
rsyslogd 879 syslog 2w CHR 1,3 0t0 6 /dev/null
rsyslogd 879 syslog 4r CHR 1,9 0t0 11 /dev/urandom
thermald 882 root 0r CHR 1,3 0t0 6 /dev/null
dbus-daem 884 messagebus 0u CHR 1,3 0t0 6 /dev/null
NetworkMa 910 root 0r CHR 1,3 0t0 6 /dev/null
accounts- 911 root 0r CHR 1,3 0t0 6 /dev/null
avahi-dae 913 avahi 0r CHR 1,3 0t0 6 /dev/null
wpa_suppl 914 root 0r CHR 1,3 0t0 6 /dev/null
wpa_suppl 914 root 11r CHR 10,62 0t0 4 /dev/rfkill
wpa_suppl 914 root 17r CHR 10,62 0t0 4 /dev/rfkill
acpid 918 root 1u CHR 1,3 0t0 6 /dev/null
acpid 918 root 2u CHR 1,3 0t0 6 /dev/null
acpid 918 root 4r CHR 13,64 0t0 149 /dev/input/event0
acpid 918 root 5r CHR 13,65 0t0 150 /dev/input/event1
acpid 918 root 6r CHR 13,74 0t0 458 /dev/input/event10
acpid 918 root 7r CHR 13,79 0t0 538 /dev/input/event15
acpid 918 root 8r CHR 13,80 0t0 539 /dev/input/event16
acpid 918 root 9r CHR 13,81 0t0 540 /dev/input/event17
acpid 918 root 10r CHR 13,82 0t0 541 /dev/input/event18
acpid 918 root 11r CHR 13,83 0t0 543 /dev/input/event19
acpid 918 root 12r CHR 13,66 0t0 151 /dev/input/event2
acpid 918 root 13r CHR 13,84 0t0 544 /dev/input/event20
acpid 918 root 14r CHR 13,67 0t0 152 /dev/input/event3
acpid 918 root 15r CHR 13,68 0t0 155 /dev/input/event4
acpid 918 root 16r CHR 13,69 0t0 288 /dev/input/event5
acpid 918 root 17r CHR 13,70 0t0 290 /dev/input/event6
acpid 918 root 18r CHR 13,72 0t0 436 /dev/input/event8
acpid 918 root 19r CHR 13,73 0t0 437 /dev/input/event9
ModemMana 919 root 0r CHR 1,3 0t0 6 /dev/null
ModemMana 919 root 2w CHR 1,3 0t0 6 /dev/null
cron 920 root 0r CHR 1,3 0t0 6 /dev/null
networkd- 921 root 0r CHR 1,3 0t0 6 /dev/null
udisksd 922 root 0r CHR 1,3 0t0 6 /dev/null
avahi-dae 923 avahi 0r CHR 1,3 0t0 6 /dev/null
systemd-l 925 root 0r CHR 1,3 0t0 6 /dev/null
systemd-l 925 root 14u CHR 13,67 0t0 152 /dev/input/event3
systemd-l 925 root 15u CHR 13,65 0t0 150 /dev/input/event1
systemd-l 925 root 16u CHR 13,64 0t0 149 /dev/input/event0
systemd-l 925 root 17u CHR 13,66 0t0 151 /dev/input/event2
systemd-l 925 root 18u CHR 13,73 0t0 437 /dev/input/event9
systemd-l 925 root 19u CHR 13,72 0t0 436 /dev/input/event8
systemd-l 925 root 20u CHR 13,68 0t0 155 /dev/input/event4
systemd-l 925 root 21u CHR 4,6 0t0 25 /dev/tty6
systemd-l 925 root 24u CHR 4,1 0t0 20 /dev/tty1
systemd-l 925 root 26u CHR 226,0 0t0 223 /dev/dri/card0
systemd-l 925 root 27u CHR 4,2 0t0 21 /dev/tty2
systemd-l 925 root 28u CHR 13,67 0t0 152 /dev/input/event3
systemd-l 925 root 29u CHR 13,69 0t0 288 /dev/input/event5
systemd-l 925 root 30u CHR 13,70 0t0 290 /dev/input/event6
systemd-l 925 root 31u CHR 13,65 0t0 150 /dev/input/event1
systemd-l 925 root 32u CHR 13,66 0t0 151 /dev/input/event2
systemd-l 925 root 33u CHR 13,78 0t0 513 /dev/input/event14
systemd-l 925 root 34u CHR 13,75 0t0 466 /dev/input/event11
systemd-l 925 root 35u CHR 13,76 0t0 468 /dev/input/event12
systemd-l 925 root 36u CHR 13,77 0t0 477 /dev/input/event13
systemd-l 925 root 37u CHR 13,73 0t0 437 /dev/input/event9
systemd-l 925 root 38u CHR 13,72 0t0 436 /dev/input/event8
systemd-l 925 root 39u CHR 13,74 0t0 458 /dev/input/event10
systemd-l 925 root 40u CHR 13,68 0t0 155 /dev/input/event4
systemd-l 925 root 41u CHR 13,71 0t0 432 /dev/input/event7
systemd-l 925 root 54u CHR 226,0 0t0 223 /dev/dri/card0
irqbalanc 927 root 0r CHR 1,3 0t0 6 /dev/null
bluetooth 931 root 0r CHR 1,3 0t0 6 /dev/null
bluetooth 931 root 12u CHR 10,62 0t0 4 /dev/rfkill
snapd 935 root 0r CHR 1,3 0t0 6 /dev/null
polkitd 972 root 0u CHR 1,3 0t0 6 /dev/null
polkitd 972 root 1u CHR 1,3 0t0 6 /dev/null
polkitd 972 root 2u CHR 1,3 0t0 6 /dev/null
colord 978 colord 0r CHR 1,3 0t0 6 /dev/null
cups-brow 982 root 0r CHR 1,3 0t0 6 /dev/null
gdm3 1064 root 0r CHR 1,3 0t0 6 /dev/null
gdm-sessi 1084 root 0r CHR 1,3 0t0 6 /dev/null
systemd 1108 gdm 0r CHR 1,3 0t0 6 /dev/null
(sd-pam 1109 gdm 0r CHR 1,3 0t0 6 /dev/null
gdm-wayla 1120 gdm 0u CHR 4,1 0t0 20 /dev/tty1
dbus-daem 1122 gdm 0u CHR 1,3 0t0 6 /dev/null
gnome-ses 1124 gdm 0r CHR 1,3 0t0 6 /dev/null
gnome-she 1130 gdm mem CHR 226,0 223 /dev/dri/card0
gnome-she 1130 gdm 0r CHR 1,3 0t0 6 /dev/null
gnome-she 1130 gdm 11u CHR 226,0 0t0 223 /dev/dri/card0
gnome-she 1130 gdm 12u CHR 226,0 0t0 223 /dev/dri/card0
upowerd 1143 root 0r CHR 1,3 0t0 6 /dev/null
upowerd 1143 root 11r CHR 13,64 0t0 149 /dev/input/event0
Xwayland 1160 gdm mem CHR 226,0 223 /dev/dri/card0
Xwayland 1160 gdm 0r CHR 1,3 0t0 6 /dev/null
Xwayland 1160 gdm 9u CHR 226,0 0t0 223 /dev/dri/card0
Xwayland 1160 gdm 10u CHR 226,0 0t0 223 /dev/dri/card0
at-spi-bu 1177 gdm 0r CHR 1,3 0t0 6 /dev/null
dbus-daem 1182 gdm 0u CHR 1,3 0t0 6 /dev/null
at-spi2-r 1184 gdm 0u CHR 1,3 0t0 6 /dev/null
pulseaudi 1188 gdm 0r CHR 1,3 0t0 6 /dev/null
pulseaudi 1188 gdm 18u CHR 116,2 0t0 525 /dev/snd/controlC0
pulseaudi 1188 gdm 25u CHR 116,2 0t0 525 /dev/snd/controlC0
pulseaudi 1188 gdm 30u CHR 116,2 0t0 525 /dev/snd/controlC0
rtkit-dae 1189 rtkit 0r CHR 1,3 0t0 6 /dev/null
ibus-daem 1212 gdm 0r CHR 1,3 0t0 6 /dev/null
ibus-dcon 1215 gdm 0r CHR 1,3 0t0 6 /dev/null
ibus-dcon 1215 gdm 1w CHR 1,3 0t0 6 /dev/null
ibus-dcon 1215 gdm 2w CHR 1,3 0t0 6 /dev/null
ibus-x11 1218 gdm 0r CHR 1,3 0t0 6 /dev/null
ibus-x11 1218 gdm 1w CHR 1,3 0t0 6 /dev/null
ibus-x11 1218 gdm 2w CHR 1,3 0t0 6 /dev/null
ibus-x11 1218 gdm 4u CHR 226,0 0t0 223 /dev/dri/card0
ibus-port 1220 gdm 0u CHR 1,3 0t0 6 /dev/null
boltd 1232 root 0r CHR 1,3 0t0 6 /dev/null
packageki 1233 root 0r CHR 1,3 0t0 6 /dev/null
gsd-xsett 1234 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-xsett 1234 gdm 4u CHR 226,0 0t0 223 /dev/dri/card0
gsd-a11y- 1239 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-clipb 1240 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-clipb 1240 gdm 4u CHR 226,0 0t0 223 /dev/dri/card0
gsd-color 1241 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-color 1241 gdm 4u CHR 226,0 0t0 223 /dev/dri/card0
gsd-datet 1245 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-house 1246 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-keybo 1247 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-keybo 1247 gdm 4u CHR 226,0 0t0 223 /dev/dri/card0
gsd-media 1251 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-media 1251 gdm 4u CHR 226,0 0t0 223 /dev/dri/card0
gsd-mouse 1252 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-power 1253 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-power 1253 gdm 4u CHR 226,0 0t0 223 /dev/dri/card0
gsd-print 1254 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-rfkil 1257 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-scree 1260 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-shari 1261 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-smart 1272 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-sound 1274 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-wacom 1275 gdm 0r CHR 1,3 0t0 6 /dev/null
gsd-wacom 1275 gdm 4u CHR 226,0 0t0 223 /dev/dri/card0
dconf-ser 1288 gdm 0u CHR 1,3 0t0 6 /dev/null
ibus-engi 1293 gdm 0r CHR 1,3 0t0 6 /dev/null
ibus-engi 1293 gdm 1w CHR 1,3 0t0 6 /dev/null
ibus-engi 1293 gdm 2w CHR 1,3 0t0 6 /dev/null
gdm-sessi 1340 root 0r CHR 1,3 0t0 6 /dev/null
canonical 1405 root 0r CHR 1,3 0t0 6 /dev/null
whoopsie 1408 whoopsie 0r CHR 1,3 0t0 6 /dev/null
kerneloop 1412 kernoops 0u CHR 1,3 0t0 6 /dev/null
kerneloop 1412 kernoops 1u CHR 1,3 0t0 6 /dev/null
kerneloop 1412 kernoops 2u CHR 1,3 0t0 6 /dev/null
kerneloop 1426 kernoops 0u CHR 1,3 0t0 6 /dev/null
kerneloop 1426 kernoops 1u CHR 1,3 0t0 6 /dev/null
kerneloop 1426 kernoops 2u CHR 1,3 0t0 6 /dev/null
teamviewe 1437 root 0r CHR 1,3 0t0 6 /dev/null
teamviewe 1437 root 1w CHR 1,3 0t0 6 /dev/null
teamviewe 1437 root 2u CHR 1,3 0t0 6 /dev/null
systemd 1444 ursus 0r CHR 1,3 0t0 6 /dev/null
(sd-pam 1445 ursus 0r CHR 1,3 0t0 6 /dev/null
gnome-key 1528 ursus 0r CHR 1,3 0t0 6 /dev/null
gnome-key 1528 ursus 1r CHR 1,3 0t0 6 /dev/null
gnome-key 1528 ursus 2r CHR 1,3 0t0 6 /dev/null
gnome-key 1528 ursus 3r CHR 1,9 0t0 11 /dev/urandom
gdm-x-ses 1672 ursus 0u CHR 4,2 0t0 21 /dev/tty2
Xorg 1674 ursus mem CHR 226,0 223 /dev/dri/card0
Xorg 1674 ursus 0u CHR 4,2 0t0 21 /dev/tty2
Xorg 1674 ursus 11u CHR 4,2 0t0 21 /dev/tty2
Xorg 1674 ursus 12u CHR 226,0 0t0 223 /dev/dri/card0
Xorg 1674 ursus 13u CHR 226,0 0t0 223 /dev/dri/card0
Xorg 1674 ursus 21u CHR 13,67 0t0 152 /dev/input/event3
Xorg 1674 ursus 24u CHR 13,69 0t0 288 /dev/input/event5
Xorg 1674 ursus 25u CHR 13,70 0t0 290 /dev/input/event6
Xorg 1674 ursus 26u CHR 13,65 0t0 150 /dev/input/event1
Xorg 1674 ursus 27u CHR 13,66 0t0 151 /dev/input/event2
Xorg 1674 ursus 28u CHR 13,78 0t0 513 /dev/input/event14
Xorg 1674 ursus 29u CHR 13,75 0t0 466 /dev/input/event11
Xorg 1674 ursus 30u CHR 13,76 0t0 468 /dev/input/event12
Xorg 1674 ursus 31u CHR 13,77 0t0 477 /dev/input/event13
Xorg 1674 ursus 32u CHR 13,73 0t0 437 /dev/input/event9
Xorg 1674 ursus 33u CHR 13,72 0t0 436 /dev/input/event8
Xorg 1674 ursus 34u CHR 13,74 0t0 458 /dev/input/event10
Xorg 1674 ursus 35u CHR 13,68 0t0 155 /dev/input/event4
Xorg 1674 ursus 36u CHR 13,71 0t0 432 /dev/input/event7
dbus-daem 1718 ursus 0u CHR 1,3 0t0 6 /dev/null
gnome-ses 1726 ursus 0r CHR 1,3 0t0 6 /dev/null
ssh-agent 1809 ursus 0u CHR 1,3 0t0 6 /dev/null
ssh-agent 1809 ursus 1u CHR 1,3 0t0 6 /dev/null
ssh-agent 1809 ursus 2u CHR 1,3 0t0 6 /dev/null
at-spi-bu 1812 ursus 0r CHR 1,3 0t0 6 /dev/null
dbus-daem 1817 ursus 0u CHR 1,3 0t0 6 /dev/null
at-spi2-r 1819 ursus 0u CHR 1,3 0t0 6 /dev/null
gnome-she 1836 ursus mem CHR 226,0 223 /dev/dri/card0
gnome-she 1836 ursus 0r CHR 1,3 0t0 6 /dev/null
gnome-she 1836 ursus 9u CHR 226,0 0t0 223 /dev/dri/card0
gvfsd 1842 ursus 0r CHR 1,3 0t0 6 /dev/null
gvfsd-fus 1847 ursus 0r CHR 1,3 0t0 6 /dev/null
gvfsd-fus 1847 ursus 3u CHR 10,229 0t0 85 /dev/fuse
pulseaudi 1858 ursus 0r CHR 1,3 0t0 6 /dev/null
pulseaudi 1858 ursus 1w CHR 1,3 0t0 6 /dev/null
pulseaudi 1858 ursus 2w CHR 1,3 0t0 6 /dev/null
pulseaudi 1858 ursus 17u CHR 116,2 0t0 525 /dev/snd/controlC0
pulseaudi 1858 ursus 24u CHR 116,2 0t0 525 /dev/snd/controlC0
pulseaudi 1858 ursus 29u CHR 116,2 0t0 525 /dev/snd/controlC0
ibus-daem 1882 ursus 0r CHR 1,3 0t0 6 /dev/null
ibus-dcon 1886 ursus 0r CHR 1,3 0t0 6 /dev/null
ibus-dcon 1886 ursus 1w CHR 1,3 0t0 6 /dev/null
ibus-dcon 1886 ursus 2w CHR 1,3 0t0 6 /dev/null
ibus-x11 1888 ursus 0r CHR 1,3 0t0 6 /dev/null
ibus-x11 1888 ursus 1w CHR 1,3 0t0 6 /dev/null
ibus-x11 1888 ursus 2w CHR 1,3 0t0 6 /dev/null
ibus-port 1890 ursus 0u CHR 1,3 0t0 6 /dev/null
gnome-she 1905 ursus 0u CHR 1,3 0t0 6 /dev/null
evolution 1920 ursus 0r CHR 1,3 0t0 6 /dev/null
goa-daemo 1928 ursus 0u CHR 1,3 0t0 6 /dev/null
goa-daemo 1928 ursus 13r CHR 1,9 0t0 11 /dev/urandom
dconf-ser 1930 ursus 0u CHR 1,3 0t0 6 /dev/null
gvfsd-met 1933 ursus 0r CHR 1,3 0t0 6 /dev/null
goa-ident 1949 ursus 0u CHR 1,3 0t0 6 /dev/null
gvfs-udis 1953 ursus 0r CHR 1,3 0t0 6 /dev/null
gvfs-mtp- 1958 ursus 0r CHR 1,3 0t0 6 /dev/null
gvfs-goa- 1962 ursus 0r CHR 1,3 0t0 6 /dev/null
gvfs-gpho 1966 ursus 0r CHR 1,3 0t0 6 /dev/null
gvfs-afc- 1970 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-mouse 1975 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-power 1976 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-print 1978 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-rfkil 1980 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-rfkil 1980 ursus 7u CHR 10,62 0t0 4 /dev/rfkill
gsd-rfkil 1980 ursus 10w CHR 10,62 0t0 4 /dev/rfkill
gsd-scree 1982 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-shari 1983 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-smart 1987 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-sound 1992 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-xsett 1993 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-wacom 1998 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-a11y- 2009 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-color 2010 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-datet 2014 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-clipb 2016 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-keybo 2018 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-media 2019 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-house 2022 ursus 0r CHR 1,3 0t0 6 /dev/null
gsd-print 2067 ursus 0r CHR 1,3 0t0 6 /dev/null
gnome-sof 2070 ursus 0r CHR 1,3 0t0 6 /dev/null
gnome-sof 2070 ursus 16r CHR 1,9 0t0 11 /dev/urandom
gsd-disk- 2077 ursus 0r CHR 1,3 0t0 6 /dev/null
nautilus- 2079 ursus 0r CHR 1,3 0t0 6 /dev/null
gvfsd-tra 2102 ursus 0r CHR 1,3 0t0 6 /dev/null
evolution 2117 ursus 0r CHR 1,3 0t0 6 /dev/null
ibus-engi 2124 ursus 0r CHR 1,3 0t0 6 /dev/null
ibus-engi 2124 ursus 1w CHR 1,3 0t0 6 /dev/null
ibus-engi 2124 ursus 2w CHR 1,3 0t0 6 /dev/null
evolution 2136 ursus 0r CHR 1,3 0t0 6 /dev/null
evolution 2147 ursus 0r CHR 1,3 0t0 6 /dev/null
evolution 2166 ursus 0r CHR 1,3 0t0 6 /dev/null
fwupd 2198 root 0r CHR 1,3 0t0 6 /dev/null
update-no 2913 ursus 0r CHR 1,3 0t0 6 /dev/null
deja-dup- 3027 ursus 0r CHR 1,3 0t0 6 /dev/null
gvfsd-htt 4800 ursus 0r CHR 1,3 0t0 6 /dev/null
dhclient 8029 root 0r CHR 1,3 0t0 6 /dev/null
dhclient 8029 root 1w CHR 1,3 0t0 6 /dev/null
dhclient 8029 root 2w CHR 1,3 0t0 6 /dev/null
gnome-ter 8220 ursus 0r CHR 1,3 0t0 6 /dev/null
gnome-ter 8220 ursus 13u CHR 5,2 0t0 88 /dev/ptmx
I have identified the source of the shrill/hissing noise: it appears after running
Removed it. Solved this issue.
I still need to unplug and plug the headphones back in every time I restart the laptop though.