Re: [PATCH v2 27/29] ACPI: video: Drop Clevo/TUXEDO NL5xRU and NL5xNU acpi_backlight=native quirks

[Werner Sembach <wse@tuxedocomputers.com>]

Hi,

On 7/12/22 21:39, Hans de Goede wrote:
> acpi_backlight=native is the default for these, but as the comment
> explains the quirk was still necessary because even briefly registering
> the acpi_video0 backlight; and then unregistering it once the native
> driver showed up, was leading to issues.
>
> After the "ACPI: video: Make backlight class device registration
> a separate step" patch from earlier in this patch-series, we no
> longer briefly register the acpi_video0 backlight on systems where
> the native driver should be used.
>
> So this is no longer an issue an the quirks are no longer needed.
>
> Cc: Werner Sembach <wse@tuxedocomputers.com>
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Tested and can confirm: The quirks are no longer needed with this Patchset.

Tested-by: Werner Sembach <wse@tuxedocomputers.com>

Kind Regards,

Werner Sembach

> ---
>   drivers/acpi/video_detect.c | 75 -------------------------------------
>   1 file changed, 75 deletions(-)
>
> diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
> index 2a4d376a703e..4b9395d1bda7 100644
> --- a/drivers/acpi/video_detect.c
> +++ b/drivers/acpi/video_detect.c
> @@ -599,81 +599,6 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
>   		DMI_MATCH(DMI_BOARD_NAME, "N250P"),
>   		},
>   	},
> -	/*
> -	 * Clevo NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2 have both a
> -	 * working native and video interface. However the default detection
> -	 * mechanism first registers the video interface before unregistering
> -	 * it again and switching to the native interface during boot. This
> -	 * results in a dangling SBIOS request for backlight change for some
> -	 * reason, causing the backlight to switch to ~2% once per boot on the
> -	 * first power cord connect or disconnect event. Setting the native
> -	 * interface explicitly circumvents this buggy behaviour, by avoiding
> -	 * the unregistering process.
> -	 */
> -	{
> -	.callback = video_detect_force_native,
> -	.ident = "Clevo NL5xRU",
> -	.matches = {
> -		DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
> -		DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"),
> -		},
> -	},
> -	{
> -	.callback = video_detect_force_native,
> -	.ident = "Clevo NL5xRU",
> -	.matches = {
> -		DMI_MATCH(DMI_SYS_VENDOR, "SchenkerTechnologiesGmbH"),
> -		DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"),
> -		},
> -	},
> -	{
> -	.callback = video_detect_force_native,
> -	.ident = "Clevo NL5xRU",
> -	.matches = {
> -		DMI_MATCH(DMI_SYS_VENDOR, "Notebook"),
> -		DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"),
> -		},
> -	},
> -	{
> -	.callback = video_detect_force_native,
> -	.ident = "Clevo NL5xRU",
> -	.matches = {
> -		DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
> -		DMI_MATCH(DMI_BOARD_NAME, "AURA1501"),
> -		},
> -	},
> -	{
> -	.callback = video_detect_force_native,
> -	.ident = "Clevo NL5xRU",
> -	.matches = {
> -		DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
> -		DMI_MATCH(DMI_BOARD_NAME, "EDUBOOK1502"),
> -		},
> -	},
> -	{
> -	.callback = video_detect_force_native,
> -	.ident = "Clevo NL5xNU",
> -	.matches = {
> -		DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
> -		DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"),
> -		},
> -	},
> -	{
> -	.callback = video_detect_force_native,
> -	.ident = "Clevo NL5xNU",
> -	.matches = {
> -		DMI_MATCH(DMI_SYS_VENDOR, "SchenkerTechnologiesGmbH"),
> -		DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"),
> -		},
> -	},
> -	{
> -	.callback = video_detect_force_native,
> -	.ident = "Clevo NL5xNU",
> -	.matches = {
> -		DMI_MATCH(DMI_SYS_VENDOR, "Notebook"),
> -		DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"),
> -		},
> -	},
>   
>   	/*
>   	 * Desktops which falsely report a backlight and which our heuristics