Question

5

Keyboard backlight sensor doesn't work on a Sony Vaio VPCS116FG

rated 0 times [ 5] [ 0] / answers: 1 / hits: 2471 / 3 Years ago, tue, august 17, 2021, 3:22:29

I have a VAIO laptop (VPCS116FG, S series). Its keyboard has sensors that can detect how bright the surrounding is, so it automatically turns on the backlight in dark places such as airplane cabins. Since I've moved to Ubuntu from Windows 7, the backlight sensor doesn't work at all.

By googling the issue, I found this website and followed the instructions, but at the compilation step, I was met with the following errors:

sa/file_funcs.c: In function ‘get_first_backlight_device_name’:

sa/file_funcs.c:44:9: warning: format ‘%li’ expects argument of type ‘long int’, but argument 2 has type ‘unsigned int’ [-Wformat]

/tmp/ccIhKx5v.o: In function `handle_acpi_events':

acpi_funcs.c:(.text+0xf8): undefined reference to `log'

acpi_funcs.c:(.text+0x109): undefined reference to `log'

acpi_funcs.c:(.text+0x120): undefined reference to `pow'

collect2: ld returned 1 exit status

How do I make it work?

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suitman

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answered 3 Years ago ravturtl · Accepted Answer

I finally managed to get the thing to compile by making one slight adjustment to the compile file:

Line 16 reads:

$CC $CFLAGS $LDFLAGS $DEFINES -o $OUTPUT $SRC_DIR/*.c

Change it to:

$CC $CFLAGS $DEFINES -o $OUTPUT $SRC_DIR/*.c $LDFLAGS

Alternatively, you can issue the following two commands right before running ./compile:

echo -e "16c16

< $CC $CFLAGS $LDFLAGS $DEFINES -o $OUTPUT $SRC_DIR/*.c

---

> $CC $CFLAGS $DEFINES -o $OUTPUT $SRC_DIR/*.c $LDFLAGS" >compile.patch

patch compile compile.patch