Re: [REGRESSION] 2017 Pixelbook backlight control doesn’t work with 7.1 kernel

On Fri, Jul 10, 2026 at 11:09:34PM -0600, Papool Chaudhari wrote:
> Greg,
> 
> I did git bisect and this is the offending commit:
> 
> b3793af3277f65d256d67f9949e760b434ff66dd is the first 'bad' commit
> commit b3793af3277f65d256d67f9949e760b434ff66dd
> Merge: 51cc1c427461 88919bedabb8
> Author: Jiri Kosina <[email protected]>
> Date: Thu Apr 16 21:08:14 2026 +0200
> 
>    Merge branch 'for-7.1/intel-thc' into for-linus
> 
>    - power management improvements to intel-thc-hid driver (Even Xu)
> 
> drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c | 16
> ++++++++++------
> drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.c | 47
> +++++++++++++++++++++++++++++++++++++++++++++++
> drivers/hid/intel-thc-hid/intel-thc/intel-thc-hw.h | 4 ++++
> 3 files changed, 61 insertions(+), 6 deletions(-)

Odd that a merge commit is the issue.  ANd if you revert that change,
all is good?

thanks,

greg k-h