+ Dell.Client.Kernel@xxxxxxxx : please look at this issue below On Tuesday 26 April 2022 14:08:27 gabriele.mzt@xxxxxxxxx wrote: > From: Gabriele Mazzotta <gabriele.mzt@xxxxxxxxx> > > The Latitude 7520 supports AC timeouts, but it has no KBD_LED_AC_TOKEN > and so changes to stop_timeout appear to have no effect if the laptop > is plugged in. > > Signed-off-by: Gabriele Mazzotta <gabriele.mzt@xxxxxxxxx> > --- > As per the discussion here https://github.com/dell/libsmbios/issues/48, > this is really a BIOS bug. My Latitude 7520 has the latest BIOS > update installed, which was released just few months ago, but the > issue is still there. In that ticket is written that issue was already fixed and discussion closed. If it is not truth then please open and report a new ticket on github. And ideally report also this issue directly to Dell BIOS team per https://github.com/dell/libsmbios/issues/48#issuecomment-391328501 because as written that this is the right way for fixing the issue, rather than kernel patch. > --- > drivers/platform/x86/dell/dell-laptop.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/drivers/platform/x86/dell/dell-laptop.c b/drivers/platform/x86/dell/dell-laptop.c > index 8230e7a68a5e..1321687d923e 100644 > --- a/drivers/platform/x86/dell/dell-laptop.c > +++ b/drivers/platform/x86/dell/dell-laptop.c > @@ -80,6 +80,10 @@ static struct quirk_entry quirk_dell_inspiron_1012 = { > .kbd_led_not_present = true, > }; > > +static struct quirk_entry quirk_dell_latitude_7520 = { > + .kbd_missing_ac_tag = true, > +}; > + > static struct platform_driver platform_driver = { > .driver = { > .name = "dell-laptop", > @@ -336,6 +340,15 @@ static const struct dmi_system_id dell_quirks[] __initconst = { > }, > .driver_data = &quirk_dell_inspiron_1012, > }, > + { > + .callback = dmi_matched, > + .ident = "Dell Latitude 7520", > + .matches = { > + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), > + DMI_MATCH(DMI_PRODUCT_NAME, "Latitude 7520"), > + }, > + .driver_data = &quirk_dell_latitude_7520, > + }, > { } > }; > > -- > 2.36.0 > In any case: Acked-by: Pali Rohár <pali@xxxxxxxxxx> But I hope that Dell fixes this issue in their BIOS.
