[Bug 1722478]

2021-01-09 (土) の 09:42 +0000 に bugzilla-daemon@bugzilla.kernel.org
さんは書きました:
> https://bugzilla.kernel.org/show_bug.cgi?id=196719
>
> --- Comment #18 from paviluf (jeremy9856@gmail.com) ---
> I don't know if it's related to the jitter you experience but with
> these tweaks
> the cursor is really precise now (read both issue as they are
> related)
>
> https://gitlab.freedesktop.org/libinput/libinput/-/issues/521
> https://gitlab.freedesktop.org/libinput/libinput/-/issues/537
>

This seem to have fixed the issue for me, but the standing issue that
it is unusable without any modification. The average user would not
bother finding out what a GRUB config is or how to add kernel boot
perameters. Doing these sorts of things so that their touchpad (and
trackpoint) doesn't permenantly fail after they wake their laptop is
not an option.

As for the libinput modifications you made in your PR, have they been
added to the systemd source? Would that fix the jitter issues for other
users out-of-the-box?

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https://bugs.launchpad.net/bugs/1722478

Title:
Two-finger scrolling and click-and-drag no longer works after resuming
from suspend

Status in Linux:
Confirmed
Status in kmod package in Ubuntu:
Confirmed
Status in linux package in Ubuntu:
Invalid

Bug description:
I own a Thinkpad T440p onto which I have had Debian 9 running without
hardware issues. I have recently installed Ubuntu 17.10 final beta to
test it out, but two-finger scrolling does not work at the moment. It
used to work out-of-the-box from the final beta iso, but a subsequent
update broke it.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.13.0-12-generic 4.13.0-12.13 [modified: boot/vmlinuz-4.13.0-12-generic]
ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
Uname: Linux 4.13.0-12-generic x86_64
ApportVersion: 2.20.7-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ghislain 10620 F.... pulseaudio
/dev/snd/controlC0: ghislain 10620 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Tue Oct 10 09:20:01 2017
HibernationDevice: RESUME=UUID=ae4cca1e-80ef-4a1e-87e3-0a860b49492e
InstallationDate: Installed on 2017-10-05 (4 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170926)
MachineType: LENOVO 20AN00C1UK
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-12-generic root=/dev/mapper/doc1485--lap--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.13.0-12-generic N/A
linux-backports-modules-4.13.0-12-generic N/A
linux-firmware 1.169
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/31/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: GLET83WW (2.37 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AN00C1UK
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGLET83WW(2.37):bd03/31/2016:svnLENOVO:pn20AN00C1UK:pvrThinkPadT440p:rvnLENOVO:rn20AN00C1UK:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad T440p
dmi.product.name: 20AN00C1UK
dmi.product.version: ThinkPad T440p
dmi.sys.vendor: LENOVO

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