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Enable Nvidia backlight EC support to resolve backlight control issues

Kate Hsuan requested to merge hpa1/centos-stream-9:wip/kate/dell-backlight-2185526 into main

The backlight of the laptop equipped with Nvidia hybrid graphic can't be configured and the user got a black screen when the system resumes working from the suspend mode. To resolve this, the Nvidia backlight EC driver should be backported to rhel from the upstream kernel. Dell had tested on Precision 7780 and reported the backport worked.

A patch of filter_module.sh from Fedora was picked to avoid the dependency problem while compiling the kernel. The ACPI_VIDEO module has a dependency on the symbol wmi_evaluate_method. It needs to be added to otherwise it will cause compile errors.

Build: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=54324872

Tested: Dell partner tested it on Dell Precision 7780

The system configurations are:

  • BIOS: 1.4.0
  • Display mode: Hybrid Mode
  • Nvidia driver: 525.116.04

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2185526

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2221211

Signed-off-by: Kate Hsuan hpa@redhat.com

Edited by Kate Hsuan

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