"Currently, there have no GMA500(Poulsbo) native video driver to support intel opregion. So, use this stub driver to enable the acpi backlight control sysfs entry files by requrest acpi_video_register."
https://patchwork.kernel.org/patch/267421/
"Currently, there have no GMA500(Poulsbo) native video driver to support register. "
intel opregion. So, use this stub driver to enable the acpi backlight
control sysfs entry files by requrest acpi_video_
https:/ /patchwork. kernel. org/patch/ 267421/