The wireless card cannot be used after the Acer laptop installs Ubuntu

Modify/etc/modprobe.d/blacklist.conf, prohibit acer-wmi use,

。。。。。。。 Omitted in front
# low-quality, just noise when being used for sound playback, causes
# hangs at desktop session start (Ubuntu: #246969)
Blacklist SND_PCSP
# Ugly and loud noise, getting on everyone ' s nerves; This should is done by a
# nice PulseAudio Bing (Ubuntu: #77010)
Blacklist PCSPKR
# EDAC driver for amd76x clashes with the AGP driver preventing the aperture
# from being initialised (Ubuntu: #297750). Blacklist so and the driver
# continues to build and are installable for the few cases where its
# really needed.
Blacklist AMD76X_EDAC
blacklist acer-wmi

http://forum.ubuntu.org.cn/viewtopic.php?t=347680