Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 086/309] ACPI: video: Do not export a non working backlight interface on MSI MS-7721 boards | Date | Mon, 10 Feb 2020 04:30:42 -0800 |
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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 @@ -336,6 +336,11 @@ 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", @@ -344,6 +349,14 @@ 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"), + }, + }, { }, };
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