slow keystroke reaction and repaint in Ubuntu 19.10
Hi. Just upgraded to Ubuntu 19.10 from a working 19.04.
A few problems arises on my Yoga S940.
1) keystrokes very often takes a while to make the character appear on screen, there's a significan lag. This happens mostly at the first keystroke after a pause, while typing continously is rarely affected at all.
2) Repaint issue on all applications. Can't describe this better, but we're all familiar when the UI just do not repaint... it takes a while or I have to switch tabs back and forth to see the updated screen
3) Sometimes the touchpad does not work at all. I have to shutdown and restart. Not: reboot often does not fix it, just actual shutdown and restart works.
4) mic does not work at all, not detected
5) sound volume is very low
Now, issue 5 was present also in 19.04, but 1-4 are brand new after upgrading to 19.10.
Of course, 1 and 2 are the most annoying, a deal breaker.
I've disabled the experimental fractional scaling which was working very nice with external monitor with 19.04, to be sure it's not its problem.
I attach infi -F and gsettings list-recursively output.
I'd be happy to help debug 1/2 mostlly before giving up.
```
System: Host: [*******] Kernel: 5.3.0-10-generic x86_64 bits: 64 Desktop: Gnome 3.34.0 Distro: Ubuntu 19.10 (Eoan Ermine)
Machine: Type: Laptop System: LENOVO product: 81Q7 v: Lenovo Yoga S940-14IWL serial: <root required>
Mobo: LENOVO model: LNVNB161216 v: SDK0J40709 WIN serial: <root required> UEFI: LENOVO v: AKCN34WW date: 06/12/2019
Battery: ID-1: BAT0 charge: 43.9 Wh condition: 53.7/52.0 Wh (103%)
CPU: Topology: Quad Core model: Intel Core i7-8565U bits: 64 type: MT MCP L2 cache: 8192 KiB
Speed: 800 MHz min/max: 400/4600 MHz Core speeds (MHz): 1: 800 2: 800 3: 800 4: 800 5: 800 6: 800 7: 800 8: 800
Graphics: Device-1: Intel UHD Graphics 620 driver: i915 v: kernel
Display: x11 server: X.Org 1.20.5 driver: i915 resolution: 1920x1080~60Hz
OpenGL: renderer: Mesa DRI Intel HD Graphics (Whiskey Lake 3x8 GT2) v: 4.5 Mesa 19.1.6
Audio: Device-1: Intel Cannon Point-LP High Definition Audio driver: snd_hda_intel
Sound Server: ALSA v: k5.3.0-10-generic
Network: Device-1: Intel Cannon Point-LP CNVi [Wireless-AC] driver: iwlwifi
IF: wlp0s20f3 state: dormant mac: 3c:f0:11:f1:76:fb
IF-ID-1: cbr0 state: up speed: N/A duplex: N/A mac: d2:e3:3c:2f:d9:82
IF-ID-2: docker0 state: down mac: 02:42:09:44:28:56
IF-ID-3: veth0dbfcbb8 state: up speed: 10000 Mbps duplex: full mac: e6:5d:a4:b0:17:b2
IF-ID-4: veth14af7559 state: up speed: 10000 Mbps duplex: full mac: 72:d9:58:83:c9:f9
IF-ID-5: veth3d5eebcc state: up speed: 10000 Mbps duplex: full mac: 42:91:61:99:8a:35
IF-ID-6: veth43bbe3a9 state: up speed: 10000 Mbps duplex: full mac: 1a:3b:c1:92:64:37
IF-ID-7: veth47aa65dc state: up speed: 10000 Mbps duplex: full mac: 7e:48:b5:4b:9c:11
IF-ID-8: veth548e60fb state: up speed: 10000 Mbps duplex: full mac: c2:a8:a7:0f:8b:fd
IF-ID-9: veth563d09f2 state: up speed: 10000 Mbps duplex: full mac: 46:60:38:54:66:72
Drives: Local Storage: total: 238.47 GiB used: 43.27 GiB (18.1%)
ID-1: /dev/nvme0n1 vendor: SK Hynix model: HFS256GD9TNG-L3A0B size: 238.47 GiB
Partition: ID-1: / size: 231.54 GiB used: 21.54 GiB (9.3%) fs: ext4 dev: /dev/dm-1
ID-2: /boot size: 704.5 MiB used: 179.1 MiB (25.4%) fs: ext4 dev: /dev/nvme0n1p2
ID-3: swap-1 size: 976.0 MiB used: 0 KiB (0.0%) fs: swap dev: /dev/dm-2
Sensors: System Temperatures: cpu: 45.0 C mobo: 36.0 C
Fan Speeds (RPM): N/A
Info: Processes: 368 Uptime: 11m Memory: 15.27 GiB used: 4.38 GiB (28.7%) Shell: bash inxi: 3.0.36
```
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