我剛剛使用此圖像啟動了樹莓派：ubuntu-16.04.3-preinstalled-server-armhf+raspi2.img
似乎未檢測到或“開箱即用”配置聲卡
root@ubuntu:/home/ubuntu# cat /proc/asound/cards
--- no soundcards ---
我對內核模組或用於加載/刪除它們的工具沒有太多經驗。我確實了解到樹莓派聲卡的模組沒有加載，所以我嘗試了：
root@ubuntu:/home/ubuntu# modprobe snd_bcm2835
似乎加載良好：
root@ubuntu:/home/ubuntu# lsmod |grep snd
snd_bcm2835 32768 0
snd_pcm 106496 1 snd_bcm2835
snd_timer 32768 1 snd_pcm
snd 81920 3 snd_bcm2835,snd_timer,snd_pcm
soundcore 16384 1 snd
我還確定alsa-utils已安裝。但我仍然無法播放聲音，並且仍然從這些命令得到以下結果：
root@ubuntu:/home/ubuntu# cat /proc/asound/cards
--- no soundcards ---
-
root@ubuntu:/home/ubuntu# aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
-
root@ubuntu:/home/ubuntu# play nice.ambient.mp3
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4292:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4292:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4292:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4771:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM default
play FAIL formats: can't open output file `default': snd_pcm_open error: No such file or directory
確保聲卡適用於該映像並且從啟動即可正常工作的正確步驟是什麼？