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Fn and brightness key causing a lot of errors in kernel logs

Dell Precision 7540

I have been trying to track a lot errors down at least where they are coming from and when I press Fn and the brightness key these errors comes up in my dmesg logs every time.

 

[21616.163915] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.PEG0.PEGP.BRT6.LCD], AE_NOT_FOUND (20190703/psargs-330)
[21616.163946] ACPI Error: Aborting method \_SB.PCI0.PEG0.PEGP.BRT6 due to previous error (AE_NOT_FOUND) (20190703/psparse-529)
[21616.164396] ACPI Error: Aborting method \EV5 due to previous error (AE_NOT_FOUND) (20190703/psparse-529)
[21616.164839] ACPI Error: Aborting method \SMEE due to previous error (AE_NOT_FOUND) (20190703/psparse-529)
[21616.165322] ACPI Error: Aborting method \SMIE due to previous error (AE_NOT_FOUND) (20190703/psparse-529)
[21616.165554] ACPI Error: Aborting method \NEVT due to previous error (AE_NOT_FOUND) (20190703/psparse-529)
[21616.165802] ACPI Error: Aborting method \_SB.PCI0.LPCB.ECDV._Q66 due to previous error (AE_NOT_FOUND) (20190703/psparse-529)

 

 These errors are known to the kernel developers and they say it is in the machine firmware and from what I can read it is a lot of machines including the 5530,7530 and mostly all the developers Precision's. The Dell XPS has the same thing going also.

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Re: Fn and brightness key causing a lot of errors in kernel logs

I have exactly the same problem on XPS 15 7590, sometimes after Fn+brightness button, my screen will go dark and these kernel errors appear.

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