Hey,

Thanks for the quick reply. How do I go around and boot up Ubuntu with an older kernel?

Sent from ProtonMail Mobile

On Fri, May 3, 2019 at 07:30, Timo Aaltonen <email address hidden> wrote:

> It's likely caused by the kernel. You should have some older kernel
> versions installed, but if not, you can install them via 'apt install
> linux-image-4.15.0-NN-generic' where NN is a number.
>
> 18.04 released with -20 (I think..), so pick something after that and
> 'bisect' these builds until you find the first version where it broke.
> Remember to select the correct kernel from the boot menu. It should be
> fairly easy to spot the offending commit in a specific kernel update.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1827407
>
> Title:
> Touchpad scrolling becomes glitchy or unresponsive
>
> Status in xinput package in Ubuntu:
> New
>
> Bug description:
> When I start Ubuntu, the touchpad scrolling (using two fingers) works
> great, but after some time (usually hours) the scrolling becomes very
> glitchy. The scrolling starts to feel very unresponsive and I have to
> do the scrolling motion two to three times to scroll the normal amount
> on a page or document. It feels like only small parts of the actual
> finger motion converts to scrolling and the rest is cut off. Sometimes
> (rarely) the scrolling just dies completely. Booting fixes this issue,
> but often the issue is back very quickly after boot. Unfortunately I
> have no steps on how to replicate this issue.
>
> This is a new-ish problem that started happening after an update at
> some point a few months ago and did not appear in the first 18.04
> release versions.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 18.04
> Package: xinput 1.6.2-1build1
> ProcVersionSignature: Ubuntu 4.15.0-48.51-generic 4.15.18
> Uname: Linux 4.15.0-48-generic x86_64
> ApportVersion: 2.20.9-0ubuntu7.6
> Architecture: amd64
> BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
> CompositorRunning: None
> CurrentDesktop: ubuntu:GNOME
> Date: Thu May 2 21:11:18 2019
> DistUpgraded: Fresh install
> DistroCodename: bionic
> DistroVariant: ubuntu
> DkmsStatus:
>  virtualbox, 5.2.18, 4.15.0-47-generic, x86_64: installed
>  virtualbox, 5.2.18, 4.15.0-48-generic, x86_64: installed
> GraphicsCard:
>  Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) (prog-if 00 [VGA controller])
>    Subsystem: Lenovo HD Graphics 5500 [17aa:5036]
> InstallationDate: Installed on 2019-01-02 (119 days ago)
> InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
> MachineType: LENOVO 20BWS1S000
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-48-generic root=UUID=cb376add-fb0b-4005-bf43-86651dcf840d ro quiet splash vt.handoff=1
> SourcePackage: xinput
> UpgradeStatus: No upgrade log present (probably fresh install)
> dmi.bios.date: 09/14/2018
> dmi.bios.vendor: LENOVO
> dmi.bios.version: JBET71WW (1.35 )
> dmi.board.asset.tag: Not Available
> dmi.board.name: 20BWS1S000
> dmi.board.vendor: LENOVO
> dmi.board.version: SDK0K11826 WIN
> dmi.chassis.asset.tag: No Asset Information
> dmi.chassis.type: 10
> dmi.chassis.vendor: LENOVO
> dmi.chassis.version: None
> dmi.modalias: dmi:bvnLENOVO:bvrJBET71WW(1.35):bd09/14/2018:svnLENOVO:pn20BWS1S000:pvrThinkPadT450s:rvnLENOVO:rn20BWS1S000:rvrSDK0K11826WIN:cvnLENOVO:ct10:cvrNone:
> dmi.product.family: ThinkPad T450s
> dmi.product.name: 20BWS1S000
> dmi.product.version: ThinkPad T450s
> dmi.sys.vendor: LENOVO
> version.compiz: compiz N/A
> version.libdrm2: libdrm2 2.4.95-1~18.04.1
> version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.8-0ubuntu0~18.04.2
> version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.8-0ubuntu0~18.04.2
> version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.2
> version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
> version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
> version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1
> version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/xinput/+bug/1827407/+subscriptions