The acpi-video backlight interface on the Acer KAV80 is broken, and worse it causes the entire machine to slow down significantly after a suspend/resume.
Blacklist it, and use the acer-wmi backlight interface instead. Note that the KAV80 is somewhat unique in that it is the only Acer model where we fall back to acer-wmi after blacklisting, rather then using the native (e.g. intel) backlight driver. This is done because there is no native backlight interface on this model. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1128309 Cc: stable@vger.kernel.org Signed-off-by: Hans de Goede <hdego...@redhat.com> -- Changes in v2: Improve commit message --- drivers/platform/x86/acer-wmi.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c index 96a0b75..26c4fd1 100644 --- a/drivers/platform/x86/acer-wmi.c +++ b/drivers/platform/x86/acer-wmi.c @@ -579,6 +579,17 @@ static const struct dmi_system_id video_vendor_dmi_table[] __initconst = { DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"), }, }, + { + /* + * Note no video_set_backlight_video_vendor, we must use the + * acer interface, as there is no native backlight interface. + */ + .ident = "Acer KAV80", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "KAV80"), + }, + }, {} }; -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
