ACK: [PATCH 0/1][SRU][F/OEM-5.6/Groovy] Fix acpi backlight issue on some thinkpads
Thadeu Lima de Souza Cascardo
cascardo at canonical.com
Tue Aug 18 12:52:03 UTC 2020
On Tue, Aug 18, 2020 at 05:49:18AM -0400, Aaron Ma wrote:
> BugLink: https://bugs.launchpad.net/bugs/1892010
>
> [Impact]
> On some ThinkPads, the BIOS reported invalid acpi backlight implement .
> Then backlight can't be changed because OS use acpi backlight by
> default.
>
> [Fix]
> Check acpi backlight mode, disable it if invalid.
>
> [Test Case]
> Verified on 3 models of thinkpad include Intel/NV/AMD GPU with positive
> results.
>
> [Regression Potential]
> Low
> Most ThinkPads now use native backlight control by default.
> Check the false acpi mode correctly.
>
Acked-by: Thadeu Lima de Souza Cascardo <cascardo at canonical.com>
> Aaron Ma (1):
> platform/x86: thinkpad_acpi: not loading brightness_init when _BCL
> invalid
>
> drivers/platform/x86/thinkpad_acpi.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> --
> 2.25.1
>
>
> --
> kernel-team mailing list
> kernel-team at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/kernel-team
More information about the kernel-team
mailing list