Hi,
The backlight issue is solved, just replace 'nomodeset' with
'i915.enable_psr=0' in grub, then backlight adjustment and screen flicker
problem are both OK.
ACPI still have a lot red alert message, but they do not bring
obvoius bad effect by now, so this bug report could be closed.
Did the dmesg's output releate with the LCD backlight problem?
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Title:
HUAWEI matebook x pro 2022 led screen backlight do not work
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** Attachment added: "UdevDb.txt"
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** Attachment added: "PulseList.txt"
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** Attachment added: "WifiSyslog.txt"
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** Attachment added: "acpidump.txt"
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** Attachment added: "Lspci-vt.txt"
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** Attachment added: "ProcModules.txt"
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** Attachment added: "RfKill.txt"
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** Attachment added: "Lsusb-v.txt"
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** Attachment added: "ProcEnviron.txt"
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** Attachment added: "Lsusb-t.txt"
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** Attachment added: "ProcInterrupts.txt"
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** Attachment added: "ProcCpuinfo.txt"
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** Attachment added: "Lsusb.txt"
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** Attachment added: "ProcCpuinfoMinimal.txt"
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** Attachment added: "CRDA.txt"
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** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1965605/+attachment/5570672/+files/Lspci.txt
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** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1965605/+attachment/5570670/+files/CurrentDmesg.txt
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** Attachment added: "IwConfig.txt"
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** Tags added: apport-collected focal
** Description changed:
linux-modules-5.13.0-37-generic
also recent kernel such as 5.16.x
LCD backlight control key do not work,dmesg report a lot of ACPI error,
I have no idea if these errors related with this problem.
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