On Fri, 2 Feb 2018 11:11:15 +0100
Jan Bramkamp <cr...@rlwinm.de> wrote:
> On 02.02.18 03:13, Bridger Dyson-Smith wrote:
> > Hi list and Michael -
> > I received a T470s at work and decided to jump into the CURRENT end
> > of the FreeBSD pool. I have a weird acpi_ibm issue and I'm not sure
> > where to start trying to diagnose the issue.
> > # uname -a
> > FreeBSD spanner 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r328126: Thu
> > Jan 18 15:25:44 UTC 2018 r...@releng3.nyi.freebsd.org:/
> > usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64
> > I've loaded acpi_ibm via /boot/loader.conf:
> > acpi_ibm_load="YES"
> > and the module shows as being loaded:
> > # kldstat | grep acpi_ibm
> > 8 1 0xffffffff8278e000 7570 acpi_ibm.ko
> > However, I don't have any of the sysctl knobs available; e.g.
> > # sysctl -a | grep acpi_ibm
> > #
> > or
> > # sysctl dev.acpi_ibm.0.fan_speed
> > sysctl: unknown oid 'dev.acpi_ibm.0.fan_speed'
> > I've (tried) to look through the commit messages on svn-src-head,
> > but I'm not seeing anything specifically related to acpi work, or I
> > just don't know what I'm looking at (a definite possibility).
> I made the same discovery on my T470s running FreeBSD 12-CURRENT. It
> has been a long time since Thinkpads were designed by IBM. The fan
> control works just fine without any special purpose module. The
> acpi_ibm module main usecase for me was always handling the special
> button events, but these days they are just secondary function on the
> regular function keys. Who needs an additional row of buttons on >2k€
> laptop when you can waste the space on a large useless trackpad.
I personally love having a large, well built trackpad *and* function
That aside, I've been working on a patch to acpi_ibm to support special
button events, bluetooth on/off and controlling the keyboard
backlight (not just for the T470s, but also for other recent Lenovo
models). I still need to update the man page and polish it, but it's
already available in a code review and I use it myself successfully (I
didn't look into things like fan control though, as those really
shouldn't be touched these days):
Direct link to the patch:
Testers and code reviews are welcome.
p.s. Make sure to load the correct kernel module in case you rebuilt
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