Ubuntu
xinput package

Touchpad scrolling becomes glitchy or unresponsive

Bug #1827407 reported by optimaldc on 2019-05-02

This bug affects 2 people

Affects		Status	Importance	Assigned to	Milestone
	xinput (Ubuntu)	Confirmed	Undecided	Unassigned

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

See original description

Tags:

Revision history for this message

optimaldc (optimaldc) wrote on 2019-05-02:

CurrentDmesg.txt Edit (68.1 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (357 bytes, text/plain; charset="utf-8")
DpkgLog.txt Edit (53.4 KiB, text/plain; charset="utf-8")
Lspci.txt Edit (9.9 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (353 bytes, text/plain; charset="utf-8")
MonitorsUser.xml.txt Edit (552 bytes, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (4.6 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (1.1 KiB, text/plain; charset="utf-8")
ProcEnviron.txt Edit (310 bytes, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (2.8 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (7.4 KiB, text/plain; charset="utf-8")
UdevDb.txt Edit (172.0 KiB, text/plain; charset="utf-8")
XorgLog.txt Edit (37.7 KiB, text/plain; charset="utf-8")
XorgLogOld.txt Edit (40.1 KiB, text/plain; charset="utf-8")
Xrandr.txt Edit (21.7 KiB, text/plain; charset="utf-8")
xdpyinfo.txt Edit (21.6 KiB, text/plain; charset="utf-8")

Revision history for this message

optimaldc (optimaldc) wrote on 2019-05-02:

I'd like to add that the glitch appears in right clicking with two fingers at the same time as well.

description:

updated

Revision history for this message

Timo Aaltonen (tjaalton) wrote on 2019-05-03:

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.

Revision history for this message

Timo Aaltonen (tjaalton) wrote on 2019-05-03:

..and testing an older kernel should verify if it's a kernel bug or not

Revision history for this message

optimaldc (optimaldc) wrote on 2019-05-03: Re: [Bug 1827407] Re: Touchpad scrolling becomes glitchy or unresponsive

Download full text (4.1 KiB)

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....

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 <tjaalton@ubuntu.com> 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

Revision history for this message

Timo Aaltonen (tjaalton) wrote on 2019-05-03:

if the boot menu doesn't show up, hit esc when the bios info screen disappears

Revision history for this message

optimaldc (optimaldc) wrote on 2019-05-06:

Download full text (3.9 KiB)

Moi,

Viimeisimmän kernelin myötä on ruvennut käymään niin, että kahden sormen toiminnot eivät enää toimi ollenkaan, kun kone käy lepotilassa.

- Timo

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Friday, May 3, 2019 9:27 AM, Timo Aaltonen <email address hidden> wrote:

> if the boot menu doesn't show up, hit esc when the bios info screen
> disappears
>
> -----------------------------------------------------------------------------------
>
> 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....

Moi,

Viimeisimmän kernelin myötä on ruvennut käymään niin, että kahden sormen toiminnot eivät enää toimi ollenkaan, kun kone käy lepotilassa.

- Timo

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Friday, May 3, 2019 9:27 AM, Timo Aaltonen <tjaalton@ubuntu.com> wrote:

> if the boot menu doesn't show up, hit esc when the bios info screen
> disappears
>
> -----------------------------------------------------------------------------------
>
> 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

Revision history for this message

Timo Aaltonen (tjaalton) wrote on 2019-05-14:

English only here ;)

What's the 'latest kernel' in this case? Did you test older kernels to see which version broke it?

Revision history for this message

Launchpad Janitor (janitor) wrote on 2021-05-03:

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in xinput (Ubuntu):
status:	New → Confirmed

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Touchpad scrolling becomes glitchy or unresponsive

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