p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

ACPI: video: Do not export a non working backlight interface on MSI MS-7721 boards 

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>
This commit is contained in:
Hans de Goede 2019-12-17 20:08:11 +01:00 committed by Rafael J. Wysocki
parent 53870cf03f
commit d21a91629f
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/acpi/video_detect.c
View File

@ -352,6 +352,11 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"), 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, .callback = video_detect_force_none,
.ident = "Dell OptiPlex 9020M", .ident = "Dell OptiPlex 9020M",
@ -360,6 +365,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 9020M"), 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"),
},
},
{ }, { },
}; };