Here's what discussion on RedHat's bugzilla says about the issue in the
thread https://bugzilla.redhat.com/show_bug.cgi?id=1701322
I've excerpted a few remarks:
---------------------------------------------
This is likely a kernel bug.
Since kernel v5.0, we enabled the high-resolution scrolling capability of the
mouse. This will allow libinput and gnome to provide smooth scrolling.
However, the setting is not persistent. Whenever the mouse goes to sleep to
save battery, the setting is reverted.
The kernel is supposed to resend the setting when the mouse comes back, but it
seems it doesn't from time to time.
The question is now whether the kernel doesn't see the "connect" event
from the mouse or if the kernel fails at sending the parameter to the
mouse.
----------------------------------------------------
Same issue here with a Logitech Performance MX mouse. A workaround seems
to be to use Solaar to turn on "Smooth Scrolling", which restores the
correct scrolling operation.
----------------------------------------------------
Turns out that solaar can try to guess the device you want so here is my
updated command wrapped by a function I stuck in my .bashrc and that I
can either execute manually or, is one so desires, could be executed in
the background at login.
function hack_bz_1701322() {
_sleep_interval=25
if [ $# -gt 0 ]; then
_DEVICE="$1"
else
_DEVICE="mouse"
fi
while true; do
if ! solaar config "$_DEVICE" | grep -qE
'^\s*smooth-scroll\s*=\s*True\s*$'; then
solaar config "$_DEVICE" smooth-scroll True
fi
sleep "$_sleep_interval"
done
}
However, the underlying issue that is causing this needs to be properly
diagnosed and fixed. At the moment, this issue has added the unintended feature
of the mouse randomly turning into a flying projectile.
** Bug watch added: Red Hat Bugzilla #1701322
https://bugzilla.redhat.com/show_bug.cgi?id=1701322
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https://bugs.launchpad.net/bugs/1871415
Title:
Upgrading 18.04 to 20.04: Issues with Logitech Mouse Scroll Button
Status in linux package in Ubuntu:
Confirmed
Bug description:
I upgraded Kubuntu 18.04 to 20.04 Beta. The bug that I'm experiencing
causes the logitech scroll button to function at a fraction of its
normal speed, making it necessary to repeatedly scroll in order to
accomplish what normally might be done with a single revolution.
WORKAROUND
1. Unplug the USB plug and plug back in.
2. Revert to an older Kernel ---> 4.18.5-041805-generic.
Not that it's directly relevant to this bug, but I've solved two other
issues by reverting to the older kernel:
https://bugs.launchpad.net/ubuntu/+bug/1871408
https://bugs.launchpad.net/ubuntu/+bug/1871411
Seems that the latest Kernel doesn't like my Thinkpad or accessories.
SOFTWARE/OS VERSIONS
System: Host: ThinkPad Kernel: 5.4.0-21-generic x86_64 bits: 64 Desktop:
KDE Plasma 5.18.3
Distro: Ubuntu 20.04 LTS (Focal Fossa)
Machine: Type: Laptop System: LENOVO product: 20HF0012US v: ThinkPad T470s
serial: <superuser/root required>
Mobo: LENOVO model: 20HF0012US v: SDK0J40697 WIN serial:
<superuser/root required> UEFI: LENOVO v: N1WET31W (1.10 )
date: 04/17/2017
Battery: ID-1: BAT0 charge: 21.6 Wh condition: 22.0/23.5 Wh (94%)
ID-2: BAT1 charge: 21.4 Wh condition: 21.7/26.3 Wh (82%)
CPU: Topology: Dual Core model: Intel Core i5-7300U bits: 64 type: MT
MCP L2 cache: 3072 KiB
Speed: 800 MHz min/max: 400/3500 MHz Core speeds (MHz): 1: 792 2:
830 3: 809 4: 822
Graphics: Device-1: Intel HD Graphics 620 driver: i915 v: kernel
Display: x11 server: X.Org 1.20.7 driver: modesetting unloaded:
fbdev,vesa resolution: 1920x1080~60Hz
OpenGL: renderer: Mesa Intel HD Graphics 620 (KBL GT2) v: 4.6 Mesa
20.0.2
Audio: Device-1: Intel Sunrise Point-LP HD Audio driver: snd_hda_intel
Sound Server: ALSA v: k5.4.0-21-generic
Network: Device-1: Intel Ethernet I219-LM driver: e1000e
IF: enp0s31f6 state: down mac: c8:5b:76:e3:99:5b
Device-2: Intel Wireless 8265 / 8275 driver: iwlwifi
IF: wlp58s0 state: up mac: f8:59:71:49:f6:2e
Drives: Local Storage: total: 476.94 GiB used: 272.06 GiB (57.0%)
ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 960 PRO 512GB size:
476.94 GiB
Partition: ID-1: / size: 33.65 GiB used: 22.44 GiB (66.7%) fs: ext4 dev:
/dev/nvme0n1p2
ID-2: swap-1 size: 15.62 GiB used: 0 KiB (0.0%) fs: swap dev:
/dev/nvme0n1p4
Sensors: System Temperatures: cpu: 36.5 C mobo: N/A
Fan Speeds (RPM): cpu: 0
Info: Processes: 236 Uptime: 1d 19h 44m Memory: 19.43 GiB used: 6.50 GiB
(33.5%) Shell: bash inxi: 3.0.38
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