The kernel paramter "psmouse.elantech_smbus=0" did the trick.
Thank you very much. No need to downgrade.
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https://bugs.launchpad.net/bugs/1825699
Title:
Touchpad not working after upgra
Please test this kernel:
https://people.canonical.com/~khfeng/lp1825699/
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Title:
Touchpad not working after upgrade to 19.04
To manage notificat
Could you try passing the following parameter in kernel cmdline:
psmouse.elantech_smbus=0
Please attach dmesg with test result.
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https://bugs.launchpad.net/bugs/1825699
Title:
Touchpa
** Summary changed:
- Touchpad not working after upgrade to 19.05
+ Touchpad not working after upgrade to 19.04
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https://bugs.launchpad.net/bugs/1825699
Title:
Touchpad not working aft