PulseAudio and gnome-sound-record display audio monitoring, but don't record

[Susmita/Rajib]

To,
My Illustrious Leaders and Members of the Pulseaudio maintenance team,

In my Lenovo system the PA Volume control and gnome sound recorder are
successfully monitoring system sounds, but gnome sound recorder isn't
recording them.

The details are explained in the snapshots and ogv video, uploaded here:
http://bit.do/PA_SndRec_Stream

I began from the Debian Forum here:
http://forums.debian.net/viewtopic.php?f=7&t=149074
The Lenovo site says that the audio driver is Realtek audio drivers
"Lenovo ideapad 320-15ISK" LNVNB161216 with the following details:
Realtek Audio_6.0.1.8652.A

Then I posted to:
"debian-laptop" <debian-laptop at lists.debian.org>,
https://lists.debian.org/debian-laptop/2021/03/msg00011.html

and

"debian-user" <debian-user at lists.debian.org>,
https://lists.debian.org/debian-user/2021/03/msg00669.html

Then as suggested from debian-user, went and posted at Alsa, here:
https://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg33005.html

Solution from alsa wasn't as satisfactory as that with PulseAudio installed.

Could you please help in this regard, so that I could record audio
while playing one, in duplex mode?

Outline of details/specifications of my used Lenovo laptop are also in the
Debian Forums post (to avoid clutter and maintain centralised notes).
http://forums.debian.net/viewtopic.php?f=7&t=146606

Select portion of hardinfo report for the Lenovo laptop:
[...]
Processor		: 4x Intel(R) Core(TM) i3-6006U CPU @ 2.00GHz
Memory		: 2041MB (1211MB used)
Operating System		: Debian GNU/Linux 9.11
-Display-
Resolution		: 1366x768 pixels
OpenGL Renderer		: Mesa DRI Intel(R) HD Graphics 520 (Skylake GT2) x86/MMX/SSE2
X11 Vendor		: The X.Org Foundation
-Multimedia-
Audio Adapter		: HDA-Intel - HDA Intel PCH
HDA Intel PCH Mic
 HDA Intel PCH Headphone
 HDA Intel PCH HDMI/DP,pcm		: 3=
 HDA Intel PCH HDMI/DP,pcm		: 7=
 HDA Intel PCH HDMI/DP,pcm		: 8=
[...]
Kernel Modules
--------------
[...]
-Loaded Modules-
rndis_host		: USB Host side RNDIS driver
cdc_ether		: USB CDC Ethernet devices
usbnet		: USB network driver framework
uas
usb_storage		: USB Mass Storage driver for Linux
cmac		: CMAC keyed hash algorithm
rfcomm		: Bluetooth RFCOMM ver 1.11
ctr		: CTR Counter block mode
ccm		: Counter with CBC MAC
fuse		: Filesystem in Userspace
[...]
snd_soc_skl		: Intel Skylake ASoC HDA driver
snd_soc_skl_ipc		: Intel Skylake IPC driver
snd_soc_sst_ipc		: Intel SST IPC generic
intel_rapl		: Driver for Intel RAPL (Running Average Power Limit)
snd_soc_sst_dsp		: Intel SST Core
[...]
snd		: Advanced Linux Sound Architecture driver for soundcards.
[...]

Regards,
Rajib Bandopadhyay
A Dedicated Debian and Knoppix user