Arch Linux

stiefel40k

Member

Registered: 2019-09-29

Posts: 4

HP Elitebook 840 G6 missing Fn-Keys

Hi,

After reading through the wiki and trying out various stuff (https://wiki.archlinux.org/index.php/Ba … ne_options and https://wiki.archlinux.org/index.php/HP … muting_key) some of the Fn-Keys (namely Brightness and Mic) are not working. xev doesn't even see them and evtest reports, that I was pressing the same key (KEY_FN_ESC) for all three keys.

Event: time 1578089296.682808, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1c
Event: time 1578089296.682808, type 1 (EV_KEY), code 28 (KEY_ENTER), value 0
Event: time 1578089296.682808, -------------- SYN_REPORT ------------
Event: time 1578089298.983008, type 4 (EV_MSC), code 4 (MSC_SCAN), value 81
Event: time 1578089298.983008, type 1 (EV_KEY), code 465 (KEY_FN_ESC), value 1
Event: time 1578089298.983008, -------------- SYN_REPORT ------------
Event: time 1578089298.990056, type 4 (EV_MSC), code 4 (MSC_SCAN), value 81
Event: time 1578089298.990056, type 1 (EV_KEY), code 465 (KEY_FN_ESC), value 0
Event: time 1578089298.990056, -------------- SYN_REPORT ------------
Event: time 1578089299.008584, type 4 (EV_MSC), code 4 (MSC_SCAN), value 42
Event: time 1578089299.008584, -------------- SYN_REPORT ------------
Event: time 1578089313.689548, type 4 (EV_MSC), code 4 (MSC_SCAN), value 81
Event: time 1578089313.689548, type 1 (EV_KEY), code 465 (KEY_FN_ESC), value 1
Event: time 1578089313.689548, -------------- SYN_REPORT ------------
Event: time 1578089313.696583, type 4 (EV_MSC), code 4 (MSC_SCAN), value 81
Event: time 1578089313.696583, type 1 (EV_KEY), code 465 (KEY_FN_ESC), value 0
Event: time 1578089313.696583, -------------- SYN_REPORT ------------
Event: time 1578089317.564831, type 4 (EV_MSC), code 4 (MSC_SCAN), value 81
Event: time 1578089317.564831, type 1 (EV_KEY), code 465 (KEY_FN_ESC), value 1
Event: time 1578089317.564831, -------------- SYN_REPORT ------------
Event: time 1578089317.571874, type 4 (EV_MSC), code 4 (MSC_SCAN), value 81
Event: time 1578089317.571874, type 1 (EV_KEY), code 465 (KEY_FN_ESC), value 0
Event: time 1578089317.571874, -------------- SYN_REPORT ------------
Event: time 1578089332.026632, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1d
Event: time 1578089332.026632, type 1 (EV_KEY), code 29 (KEY_LEFTCTRL), value 1
Event: time 1578089332.026632, -------------- SYN_REPORT ------------
Event: time 1578089332.120302, type 4 (EV_MSC), code 4 (MSC_SCAN), value 2e
Event: time 1578089332.120302, type 1 (EV_KEY), code 46 (KEY_C), value 1
Event: time 1578089332.120302, -------------- SYN_REPORT ------------

As it was written inhttps://bbs.archlinux.org/viewtopic.php?id=230932 I also tried to set

acpi_osi=

but didn't do anything to be honest.

To be completely honest during the startup the laptop shows some BIOS bugs (AE_AML_BUFFER_LIMIT, AE_AML_PACKAGE_LIMIT) which I'm going to try to fix, as soon as I manage to create a bios update disk from the exe, as there is no windows installation on this machine.

Do you think they are related? If not do you have any idea what else I could try?

Thanks and cheers,
Stiefel

paulkerry

Member

From: Sheffield, UK

Registered: 2014-10-02

Posts: 611

Re: HP Elitebook 840 G6 missing Fn-Keys

To be completely honest during the startup the laptop shows some BIOS bugs (AE_AML_BUFFER_LIMIT, AE_AML_PACKAGE_LIMIT) which I'm going to try to fix, as soon as I manage to create a bios update disk from the exe, as there is no windows installation on this machine.

see...
https://bbs.archlinux.org/viewtopic.php … 8#p1870408

Do you think they are related?

probably not - you usually get bios warnings like that on most systems.

If not do you have any idea what else I could try?

https://bbs.archlinux.org/viewtopic.php?id=222318 ?

If you find something that works, please report back.

Cheers
Paul.

stiefel40k

Member

Registered: 2019-09-29

Posts: 4

Re: HP Elitebook 840 G6 missing Fn-Keys

Hi,

sorry, that it took me so long to come back. So upgrading the BIOS to the currently newest version (01.03.04 Rev.A) solved the issue with the brightness buttons, but everything else stayed as it was. I'm going to try the mapping trick some time later which is mentioned for G1 in the wiki.

I'll report back if the mapping works, but I doubt it would. I think I tried it already...

Cheers,
stiefel

darose

Member

Registered: 2004-04-13

Posts: 158

Re: HP Elitebook 840 G6 missing Fn-Keys

Anyone found any solution to this?  I'm still having this issue.

More details at:
https://lists.archlinux.org/pipermail/a … 47549.html
https://lists.archlinux.org/pipermail/a … 47550.html