| From d21a91629f4b8e794fc4c0e0c17c85cedf1d806c Mon Sep 17 00:00:00 2001 |
| From: Hans de Goede <hdegoede@redhat.com> |
| Date: Tue, 17 Dec 2019 20:08:11 +0100 |
| Subject: ACPI: video: Do not export a non working backlight interface on MSI MS-7721 boards |
| |
| From: Hans de Goede <hdegoede@redhat.com> |
| |
| commit d21a91629f4b8e794fc4c0e0c17c85cedf1d806c upstream. |
| |
| Despite our heuristics to not wrongly export a non working ACPI backlight |
| interface on desktop machines, we still end up exporting one on desktops |
| using a motherboard from the MSI MS-7721 series. |
| |
| I've looked at improving the heuristics, but in this case a quirk seems |
| to be the only way to solve this. |
| |
| While at it also add a comment to separate the video_detect_force_none |
| entries in the video_detect_dmi_table from other type of entries, as we |
| already do for the other entry types. |
| |
| Cc: All applicable <stable@vger.kernel.org> |
| BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1783786 |
| Signed-off-by: Hans de Goede <hdegoede@redhat.com> |
| Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/acpi/video_detect.c | 13 +++++++++++++ |
| 1 file changed, 13 insertions(+) |
| |
| --- a/drivers/acpi/video_detect.c |
| +++ b/drivers/acpi/video_detect.c |
| @@ -328,6 +328,11 @@ static const struct dmi_system_id video_ |
| DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"), |
| }, |
| }, |
| + |
| + /* |
| + * Desktops which falsely report a backlight and which our heuristics |
| + * for this do not catch. |
| + */ |
| { |
| .callback = video_detect_force_none, |
| .ident = "Dell OptiPlex 9020M", |
| @@ -336,6 +341,14 @@ static const struct dmi_system_id video_ |
| DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 9020M"), |
| }, |
| }, |
| + { |
| + .callback = video_detect_force_none, |
| + .ident = "MSI MS-7721", |
| + .matches = { |
| + DMI_MATCH(DMI_SYS_VENDOR, "MSI"), |
| + DMI_MATCH(DMI_PRODUCT_NAME, "MS-7721"), |
| + }, |
| + }, |
| { }, |
| }; |
| |
