Re: intel_vbtn dead keyboard bug on Acer Aspire E5-511G

Re: intel_vbtn dead keyboard bug on Acer Aspire E5-511G

[Andy Shevchenko]

+Cc: mailing list and maintainers

On Mon, Oct 05, 2020 at 05:59:40PM +0300, Игорь wrote:
> Good time of day!
> Sorry for bothering you, I found a strange bug in "intel_vbtn" kernel
> module which makes the keyboard non-responding.
> Reproducible 100% starting from kernel 5.4.0-45 and till 5.8.0-20.
> Everything works fine on 5.4.0-42 or on Windows 10
> 
> As a workaround I blacklisted the intel_vbtn module and everything works
> fine. Seems like it somehow relative to tablet mode detection patch.
> 
> I did research and found out that this bug is affecting Acer Aspire E5-511G
> laptops and some HP model(s).
> Here it is: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1894017
> 
> Looking forward to hearing something from you.
> Thanks for your attention!
> 
> Best regards
> Igor

-- 
With Best Regards,
Andy Shevchenko

Re: intel_vbtn dead keyboard bug on Acer Aspire E5-511G

[Hans de Goede]

Hi Igor,

On 10/6/20 12:16 PM, Andy Shevchenko wrote:
> +Cc: mailing list and maintainers
> 
> On Mon, Oct 05, 2020 at 05:59:40PM +0300, Игорь wrote:
>> Good time of day!
>> Sorry for bothering you, I found a strange bug in "intel_vbtn" kernel
>> module which makes the keyboard non-responding.
>> Reproducible 100% starting from kernel 5.4.0-45 and till 5.8.0-20.
>> Everything works fine on 5.4.0-42 or on Windows 10
>>
>> As a workaround I blacklisted the intel_vbtn module and everything works
>> fine. Seems like it somehow relative to tablet mode detection patch.
>>
>> I did research and found out that this bug is affecting Acer Aspire E5-511G
>> laptops and some HP model(s).
>> Here it is: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1894017
>>
>> Looking forward to hearing something from you.
>> Thanks for your attention!

Thank you for your bug report.

This should be fixed by this upstream commit, which landed in Linus' tree a couple of hours ago:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/platform/x86?id=8169bd3e6e193497cab781acddcff8fde5d0c416

Igor, if you do:

cat /sys/class/dmi/id/chassis_type

On your laptop, and the output is NOT "31" or "32" then this
fix should work for you.

If the output actually is "31" or "32 (which I do not expect),
then please let me know, because then we need a different fix.

I've also added this comment to the launchpad bug.

Regards,

Hans