boot problem trial

[inux]

hello, I installed ubuntu on the laptop, slackware, freebsd, but with grub2 grub sees me and not slackware

freebsd disk is partitioned as follows:

ubuntu first partition sda1
slackware second partition sda2
freebsd third partition sda3

reading the forum I found my problem but I can not solve it. Written to the file /etc/grub.d/40_custom this:

menuentry "FreeBSD" (
set root (hd0, 3,)
chainloader +1
)

but nothing anybody has solved the problem that can help me? I tried them all thanks.

 

[EdGe]

Greetings.

The freebsd device configuration syntax must include the slice letter of root (in general "a")

set root=(hd0,3,a)

After editing etc/grub.d/40_custom don't forget to run
# grub-mkconfig

Edit:
Please put braces instead of parentheses

menuentry "FreeBSD" [highlight]{[/highlight]
.....
[highlight]}[/highlight]

EdGe