IBM Thinkpad T420s
Hardware Overview
- CPU: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz (2491.96-MHz K8-class CPU)
Wireless: iwn0: <Intel Centrino Ultimate-N 6300>
Wired: em0: <Intel(R) PRO/1000 Network Connection 7.6.1-k>
- Graphics: Intel
- USB both 2.0 and 3.0 OK
- Bluetooth: Yes
Notes
- acpi_ibm seems to work just fine. No issues noted.
- suspend/resume does works with 'intel' and without 'sna' acceleration
Attachments
Other
This workaround is needed to have working headphones redirection in the Mini Jack port.
These lines in /boot/device.hints file followed by reboot(8) solves the problem:
# SOUND ON HEADPHONES hint.hdaa.0.nid31.config="as=1" hint.hdaa.0.nid25.config="as=1 seq=15 device=Headphones mute=0 misc=0" hint.hdaa.0.nid28.config="as=1 seq=15 device=Headphones mute=0 misc=0"
Details: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222636