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** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1872333
Title:
MSFT0001:01 touchpad randomly does not work after boot (Lenovo Yoga
S740)
Status in linux package in Ubuntu:
Confirmed
Bug description:
About 50% of the Ubuntu 20.04 Ubuntu boots end up so that the touchpad
of my Lenovo Yoga S740 does not work (cursor does not move). External
mouse works even then. After one or two reboots the touchpad starts
working, and it works until the next boot, when it may not work again.
This seems very similar to this Lenovo Yoga S940 touchpad problem:
https://bbs.archlinux.org/viewtopic.php?id=252711
Attached (i2c_error.txt) is the output of "dmesg |grep i2c" on a boot
when the touchpad did not work. The main error message seems to be
"i2c_designware i2c_designware.1: controller timed out". The name of
the touchpad is "MSFT0001:01 06CB:CDB0 Touchpad" (from cat
/proc/bus/input/devices)
This bug report has been created on a boot where the touchpad does
work.
FYI, on Windows, the touchpad has always worked without problems.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-21-generic 5.4.0-21.25
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
ApportVersion: 2.20.11-0ubuntu26
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: elias 1447 F.... pulseaudio
/dev/snd/controlC0: elias 1447 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 12 19:56:05 2020
InstallationDate: Installed on 2019-11-19 (144 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: LENOVO 81RS
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-21-generic
root=UUID=101c7da4-860d-4496-ae06-d98699795f9a ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.4.0-21-generic N/A
linux-backports-modules-5.4.0-21-generic N/A
linux-firmware 1.187
SourcePackage: linux
UpgradeStatus: Upgraded to focal on 2020-04-04 (8 days ago)
dmi.bios.date: 03/10/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: BYCN33WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Yoga S740-14IIL
dmi.modalias:
dmi:bvnLENOVO:bvrBYCN33WW:bd03/10/2020:svnLENOVO:pn81RS:pvrLenovoYogaS740-14IIL:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrLenovoYogaS740-14IIL:
dmi.product.family: Yoga S740-14IIL
dmi.product.name: 81RS
dmi.product.sku: LENOVO_MT_81RS_BU_idea_FM_Yoga S740-14IIL
dmi.product.version: Lenovo Yoga S740-14IIL
dmi.sys.vendor: LENOVO
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