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I have a PC with Kubuntu 13.10 64-bit on it. The problem is that whenever I log in (automatic log in is enabled), there is a loud double-click noise that sounds from the speakers whether the volume is muted or not. I have two sound cards; the motherboard audio, which is disabled in the BIOS, and the Creative! Labs Sound Blaster X-Fi SB0460, which I have normal speakers plugged into. Does anyone know how to fix this?

Relative lspci lines:

00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] BeaverCreek HDMI Audio [Radeon HD 6500D and 6400G-6600G series]
02:05.0 Multimedia audio controller: Creative Labs SB X-Fi

Using default Phonon backend.

(I am not really sure what other information to provide, but will gladly edit in anything upon request.)

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Try if this helps (Kubuntu should also use lightdm): askubuntu.com/questions/24946/… –  Takkat Nov 7 '13 at 22:48
    
Thank you for the suggestion; unfortunately, it did not work. It's not the default Ubuntu login sound: it doesn't sound like a double drum beat, but more like two rapid, harsh clicking noises. –  Richard Nov 8 '13 at 1:22

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