• ×
    Information
    Windows update impacting certain printer icons and names. Microsoft is working on a solution.
    Click here to learn more
    Information
    Need Windows 11 help?
    Check documents on compatibility, FAQs, upgrade information and available fixes.
    Windows 11 Support Center.
  • post a message
  • ×
    Information
    Windows update impacting certain printer icons and names. Microsoft is working on a solution.
    Click here to learn more
    Information
    Need Windows 11 help?
    Check documents on compatibility, FAQs, upgrade information and available fixes.
    Windows 11 Support Center.
  • post a message
Guidelines
The HP Community is where owners of HP products, like you, volunteer to help each other find solutions.
Archived This topic has been archived. Information and links in this thread may no longer be available or relevant. If you have a question create a new topic by clicking here and select the appropriate board.

‎08-20-2020 03:56 PM - last edited on ‎08-20-2020 04:04 PM by

HP Recommended
Product: Elitebook 850 G6
Operating System: Linux

When I press any of brightness button just nothing happens (not even popped up brightness indicator). Brightness set to 100% by default and doesn't change. I tried to google this problem and it seems nothing works. But I have to note the brightness buttons work on Windows and most of others Fn buttons work in both systems.

 

I tried to play with acpi_backlight and acpi_osi kernel parameters settings various values like vendor/video for acpi_backlight and empty acpi_osi.

And tried to update kernel to the latest available (5.9.0rc1)

It didn't help.

 

 

 

I guess the buttons may not work because broken ACPI tables in the latest R70(1.5.3) BIOS. But I don't really know what does it affect.

 

Some related logs:

[ 0.460538] ACPI: \_SB_.PR00: _OSC native thermal LVT Acked
[ 0.461733] ACPI BIOS Error (bug): AE_AML_BUFFER_LIMIT, Field [CAP1] at bit offset/length 64/32 exceeds size of target Buffer (64 bits) (20200717/dsopcode-198)
[ 0.461748] fbcon: Taking over console
[ 0.461758] No Local Variables are initialized for Method [_OSC]
[ 0.461760] Initialized Arguments for Method [_OSC]: (4 arguments defined for method invocation)
[ 0.461760] Arg0: 00000000f49d45db <Obj> Buffer(16) 6E B0 11 08 27 4A F9 44
[ 0.461768] Arg1: 0000000035c1bda1 <Obj> Integer 0000000000000001
[ 0.461770] Arg2: 00000000f987fdb6 <Obj> Integer 0000000000000002
[ 0.461773] Arg3: 00000000b6338856 <Obj> Buffer(8) 01 00 00 00 FF 10 00 00
[ 0.461779] ACPI Error: Aborting method \_SB._OSC due to previous error (AE_AML_BUFFER_LIMIT) (20200717/psparse-529)

...

[ 1.006853] ACPI BIOS Error (bug): AE_AML_PACKAGE_LIMIT, Index (0x000000005) is beyond end of object (length 0x5) (20200717/exoparg2-393)
[ 1.006933]
Initialized Local Variables for Method [GETP]:
[ 1.006934] Local0: 00000000648c9103 <Obj> Integer 0000000000000003
[ 1.006939] Initialized Arguments for Method [GETP]: (2 arguments defined for method invocation)
[ 1.006940] Arg0: 00000000fd6e190e <Obj> Integer 0000000000000005
[ 1.006943] Arg1: 00000000fde0c06c <Obj> Integer 0000000000000003
[ 1.006948] ACPI Error: Aborting method \_TZ.GETP due to previous error (AE_AML_PACKAGE_LIMIT) (20200717/psparse-529)
[ 1.007012] ACPI Error: Aborting method \_TZ.CHGZ._CRT due to previous error (AE_AML_PACKAGE_LIMIT) (20200717/psparse-529)
[ 1.008535] ACPI BIOS Error (bug): AE_AML_PACKAGE_LIMIT, Index (0x000000005) is beyond end of object (length 0x5) (20200717/exoparg2-393)
[ 1.008615]
Initialized Local Variables for Method [GETP]:
[ 1.008616] Local0: 00000000607a4a9a <Obj> Integer 0000000000000003
[ 1.008620] Initialized Arguments for Method [GETP]: (2 arguments defined for method invocation)
[ 1.008621] Arg0: 0000000073e523a3 <Obj> Integer 0000000000000005
[ 1.008624] Arg1: 00000000405cac73 <Obj> Integer 0000000000000003
[ 1.008629] ACPI Error: Aborting method \_TZ.GETP due to previous error (AE_AML_PACKAGE_LIMIT) (20200717/psparse-529)
[ 1.008692] ACPI Error: Aborting method \_TZ.CHGZ._CRT due to previous error (AE_AML_PACKAGE_LIMIT) (20200717/psparse-529)
[ 1.008762] [Firmware Bug]: No valid trip found

 

Kubuntu 20.04.1

 

Is there any workaround for the buttons?

Archived This topic has been archived. Information and links in this thread may no longer be available or relevant. If you have a question create a new topic by clicking here and select the appropriate board.
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation.

Didn't find what you were looking for? Ask the community

† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.