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[Bug 1478696] Re: dell-laptop: Incorrect keyboard backlight detection
I'm seeing my logs spammed with "dell_laptop: Keyboard brightness level
control not supported" too. Have you reported the bug upstream already?
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dell-laptop: Incorrect keyboard backlight detection
Status in linux package in Ubuntu:
I own Dell Inspiron M5110 (Q15R). This laptop has no keyboard backlight, but dell-laptop claims otherwise.
My syslog was getting spammed with "Keyboard brightness level control not supported" as dell-laptop was trying to get/set backlight values.
In dell-laptop there is kbd_led_present variable, but on my M5110 it's
being set to true:
ret = kbd_init_info();
if (kbd_token_bits != 0 || ret == 0)
kbd_led_present = true;
kbd_token_bits is 0, but so is ret.
kbd_init_info method is only returning != 0 if kbd_get_info is returning != 0
(Basing on this: http://linux.dell.com/cgi-bin/cgit.cgi/libsmbios.git/tree/src/bin/smbios-keyboard-ctl#n667)
kbd_get_info method returns only cbRES1 value of following smbios call :
And it returns 0...
I found that any cbRES of this call is giving me nothing but zeros, as if it wasn't defined in my BIOS. I have it's newest version for my laptop:
[ 0.000000] SMBIOS 2.7 present.
[ 0.000000] DMI: Dell Inc. Inspiron M5110/0X7W03, BIOS A05 03/22/2012
However, if "cbRES3, byte2 Number of keyboard light brightness
levels" is 0 as well, that should mean backlight is not available,
right? I'm attaching possible fix.
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