ACPI events stop work

[eco]

Laptop: Lenovo Thinkpad Edge S230u Twist eCS 2.2 ? ACPI: 3.20.04 -- ​http://ecomstation.ru/temp/201406/acpi-20140604a.txt

After boot the battery level is changing as expected: 43% 46:52 43% 46:48 .. 42% 46:20

Now let's change the brigthness. -1 level

AFTER THIS: battery level doesn't change anymore

Change brighntess one more time -1 / +1 it doesn't change anymore

seems that all ACPI events stall.

[David Azarewicz]

Version 3.20.04 is extremely old and no longer supported.

I cannot reproduce anything like this on any of my systems with current software.

[eco]

The user installed 3.22.03

• The system boots

• The behavior of Brightness change is the same. It is changed to +2 levels and then all ACPI events stop work: Battery level doesn't change, user can't change Brightness level anymore

[abwillis]

I was about to post that it works as expected on a Lenovo Thinkpad W500, however; I left the brightness just a bit lower than I want it and tried to bring it up a notch and it now doesn't change. I ran it all the way up and down a couple times but left it for the time to logon to the site and start to type and now the brightness is not changing.

[eco]

OS/2 GURU Jam Session:

1) Thinkpad X61s / ACPI 3.22.03, no action, no reaction when you press Fn+Home

2) Thinkpad T510 / ACPI 3.22.02, brightness adjustment works fine, no hangs