I made the changes described in comment #6, after disabling the on motherboard graphics/sound, and my system now indeed recognizes the audio device(s) on the GT220 card:
$ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: NVidia [HDA NVidia], device 7: NVIDIA HDMI [NVIDIA HDMI] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: NVidia [HDA NVidia], device 8: NVIDIA HDMI [NVIDIA HDMI] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: NVidia [HDA NVidia], device 9: NVIDIA HDMI [NVIDIA HDMI] Subdevices: 1/1 Subdevice #0: subdevice #0
$ lspci | grep Audio 02:00.1 Audio device: nVidia Corporation High Definition Audio Controller (rev a1)
...but despite all that, no sound coming out of the speakers of the TV my computer is connected to. Have I overlooked something?
I made the changes described in comment #6, after disabling the on motherboard graphics/sound, and my system now indeed recognizes the audio device(s) on the GT220 card:
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 7: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 8: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 9: NVIDIA HDMI [NVIDIA HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
$ lspci | grep Audio
02:00.1 Audio device: nVidia Corporation High Definition Audio Controller (rev a1)
...but despite all that, no sound coming out of the speakers of the TV my computer is connected to. Have I overlooked something?