在某些用戶帳戶中，音訊正常。在其他情況下，它是安靜的，或者如果你把耳朵放在筆記型電腦外殼上幾乎聽不到。
OK 帳號中的音量控制如下所示。
在不OK的帳戶中。
診斷：
- 管理員帳戶中會出現正常和不正常的情況。此外，「來賓」帳戶實際上具有良好的音訊。
- 擺弄 PulseAudio 或 AlsaMixer 設定並不能解決問題。
- 兩種情況下的 lspci 輸出相同。附於下文。
使用 Xubuntu 14.04。如果我在登入時選擇 Xfce 還是 Xubuntu，就會發生此問題。
lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06)
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05)
00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d5)
00:1c.1 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #2 (rev d5)
00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d5)
00:1c.3 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 (rev d5)
00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation HM86 Express LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 05)
00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 05)
01:00.0 3D controller: NVIDIA Corporation GK107M [GeForce GT 750M] (rev a1)
04:00.0 Network controller: Intel Corporation Wireless 7260 (rev 73)
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)
答案1
也許，您可以刪除$HOME/.pulse/ folder和$HOME/.pulse-cookie檔案。
我沒有測試這一點，但這對我有用：將$HOME/.pulse/ folder和$HOME/.pulse-cookie文件從複製（使用 sudo）$USER_A到$USER_B，chown將它們複製到$USER_B。