Re: [Dorset] Cannot Set the Volume Using amixer under bullseye
On Sunday, 2 January 2022 13:59:11 GMT Hamish McIntyre-Bhatty wrote: > Has Raspbian perhaps switched to using PipeWire for audio I wonder? > Pipewire is meant to overcome the many issues with Pulseaudio so I > wonder if they might have done that, and that is the cause of the old > commands not working. I haven't been able to find many references to pipewire WRT the Raspberry Pi OS. Interestingly in one Forum post, a user asking a query about the Pi 400, says 'I see that pulse audio and pipewire is running'. I see pipewire running on my desktop machine if I search for it in htop, but not on any of the three Pis I have running here (VPN, Music and Bells). However, they are all running Raspberry Pi OS Lite; the full version may have it or will get it soon. > Definitely makes me think twice about upgrading the river system pis. I only did it with these Pis because there's a fair time before they're needed in anger and it's easy to go back to buster using the SD Card backups. I think that trying to bring all of the River System Pis up to bullseye at the same time would be a bit of a nightmare just at the moment. -- Terry Coles -- Next meeting: Online, Jitsi, Tuesday, 2022-01-04 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] Cannot Set the Volume Using amixer under bullseye
On 02/01/2022 10:54, Terry Coles wrote: On Sunday, 2 January 2022 09:53:48 GMT Terry Coles wrote: Initially it didn't work, but then I realised that pulseaudio probably wasn't installed by default in Raspberry PI OS Lite. After installation I got a permission error, but it worked after a reboot. This is weird. Installing pulseaudio allowed me to set the volume using the '-D pulse' switch, but I could get nothing from the speakers. So I purged pulseaudio and my speakers burst into life again. The weird thing is that the command: amixer -D pulse set Master 50% still works. How can that be? Has Raspbian perhaps switched to using PipeWire for audio I wonder? Pipewire is meant to overcome the many issues with Pulseaudio so I wonder if they might have done that, and that is the cause of the old commands not working. Definitely makes me think twice about upgrading the river system pis. Hamish -- Next meeting: Online, Jitsi, Tuesday, 2022-01-04 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] Cannot Set the Volume Using amixer under bullseye
On Sunday, 2 January 2022 09:53:48 GMT Terry Coles wrote: > Initially it didn't work, but then I realised that pulseaudio probably > wasn't installed by default in Raspberry PI OS Lite. After installation I > got a permission error, but it worked after a reboot. This is weird. Installing pulseaudio allowed me to set the volume using the '-D pulse' switch, but I could get nothing from the speakers. So I purged pulseaudio and my speakers burst into life again. The weird thing is that the command: amixer -D pulse set Master 50% still works. How can that be? -- Terry Coles -- Next meeting: Online, Jitsi, Tuesday, 2022-01-04 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] Cannot Set the Volume Using amixer under bullseye
On Saturday, 1 January 2022 10:23:26 GMT Terry Coles wrote: > Things have moved on. I have two Pis configured to use these speaker > bonnets; a Pi 3 to play the music in the Nave and a Pi Zero to play the > bells and chimes in the tower. It turns out that amixer works fine on the > Pi 3 but as described on the Zero. I have no idea why this command works on a Pi 3, but not on a Zero (I'd love to know). However, a respondent on the Raspberry Pi Forums suggested using pulseaudio, eg: amixer -D pulse set Master 50% Initially it didn't work, but then I realised that pulseaudio probably wasn't installed by default in Raspberry PI OS Lite. After installation I got a permission error, but it worked after a reboot. -- Terry Coles -- Next meeting: Online, Jitsi, Tuesday, 2022-01-04 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] Cannot Set the Volume Using amixer under bullseye
On Friday, 31 December 2021 17:40:58 GMT Patrick Wigmore wrote: > This looks like it should be a valid command, based on the > configuration you listed and according to the amixer man page that's > in the Debian bullseye alsa-utils package. Things have moved on. I have two Pis configured to use these speaker bonnets; a Pi 3 to play the music in the Nave and a Pi Zero to play the bells and chimes in the tower. It turns out that amixer works fine on the Pi 3 but as described on the Zero. I've tried re-running the Adafruit installation script on the Zero and I've checked all the dependencies of alsa-utils; everything seems fine, except for the volume setting. I've just posted a query on the Adafruit Forums, but if no-one can shed any light on this, I'll have to start again with a clean bullseye installation. If that doesn't work, I'll have to go back to buster, but only on the Zero -- Terry Coles -- Next meeting: Online, Jitsi, Tuesday, 2022-01-04 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] Cannot Set the Volume Using amixer under bullseye
On Friday, 31 December 2021 17:40:58 GMT Patrick Wigmore wrote: > This looks like it should be a valid command, based on the > configuration you listed and according to the amixer man page that's > in the Debian bullseye alsa-utils package. It was certainly valid when I originally wrote it about 5 years ago! It has worked throughout until this upgrade. > Are you saying that the "amixer: Invalid command!" error is produced > when you run that amixer command directly? > > In other words, have you ruled out the possibility that the Python > program has somehow begun to pass unexpected arguments to amixer? Yes. It fails from the shell and from the program. In the Python program it is passed to the OS using: subprocess.call(['amixer', '-c', '0', 'set', 'PCM', 'playback', tower_vol]) with tower_vol having been set previously. As I say that line of code has worked for many years until now. (I dropped the 'playback in the command I gave in this thread because it was basically straight out of the man page. It still fails if I add 'playback'.) -- Terry Coles -- Next meeting: Online, Jitsi, Tuesday, 2022-01-04 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] Cannot Set the Volume Using amixer under bullseye
On Fri, 31 Dec 2021 16:21:34 +, Terry Coles wrote: > I need the volume to be controllable from my Python program, so I > set it once at the beginning when the program is launched, eg: > > amixer -c 0 set PCM 100 This looks like it should be a valid command, based on the configuration you listed and according to the amixer man page that's in the Debian bullseye alsa-utils package. That form of command works fine with amixer 1.1.8 on my laptop. Are you saying that the "amixer: Invalid command!" error is produced when you run that amixer command directly? In other words, have you ruled out the possibility that the Python program has somehow begun to pass unexpected arguments to amixer? Patrick -- Next meeting: Online, Jitsi, Tuesday, 2022-01-04 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] Cannot Set the Volume Using amixer under bullseye
On Friday, 31 December 2021 17:03:07 GMT PeterMerchant wrote: > On my desktop (Kubuntu 20.04) > > Amixer gives: > > peterm@peterm-MBB-34204H:~$ amixer > Simple mixer control 'Master',0 >Capabilities: pvolume >Playback channels: Front Left - Front Right >Limits: Playback 0 - 31 >Mono: >Front Left: Playback 31 [100%] >Front Right: Playback 31 [100%] > Simple mixer control '3D Control - Switch',0 >Capabilities: pswitch pswitch-joined >Playback channels: Mono >Mono: Playback [off] > Simple mixer control 'PCM',0 >Capabilities: pvolume pswitch pswitch-joined cswitch >Playback channels: Front Left - Front Right >Capture channels: Front Left - Front Right >Limits: Playback 0 - 31 >Front Left: Playback 24 [77%] [on] Capture [off] >Front Right: Playback 24 [77%] [on] Capture [off] > Simple mixer control 'Synth',0 > .. and a whole bunch more > > I notice that the setup is different. Does it need to be 'pvolume' in > yours? The thing is Peter, command amixer without any parameters simply lists what devices the machine has and what the alsa capabilities are for each device. Your PCM sound device has the capability 'pvolume' and mine only has 'volume'. AFAIK, I can't change those capabilities because they relate to the hardware installed. Don't forget that this code worked before I upgraded to bullseye. -- Terry Coles -- Next meeting: Online, Jitsi, Tuesday, 2022-01-04 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] Cannot Set the Volume Using amixer under bullseye
On 31/12/2021 16:21, Terry Coles wrote: I'm beginning to think that upgrading the music and bells Pis to bullseye might have been a bit premature. I cannot get amixer to work properly. The sound card is an Adafruit Speaker Bonnet. The code shown below worked under buster. Here is the configuration: pi@minster-bells:~ $ amixer Simple mixer control 'PCM',0 Capabilities: volume Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 255 Front Left: 255 [100%] Front Right: 255 [100%] I need the volume to be controllable from my Python program, so I set it once at the beginning when the program is launched, eg: amixer -c 0 set PCM 100 (where the value is a variable in reality, but this doesn't work either.) I get: amixer: Invalid command! Any thoughts on what could be wrong? speaker-test and playing an mp3 file works fine using mpg123. I just can't set the volume. On my desktop (Kubuntu 20.04) Amixer gives: peterm@peterm-MBB-34204H:~$ amixer Simple mixer control 'Master',0 Capabilities: pvolume Playback channels: Front Left - Front Right Limits: Playback 0 - 31 Mono: Front Left: Playback 31 [100%] Front Right: Playback 31 [100%] Simple mixer control '3D Control - Switch',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'PCM',0 Capabilities: pvolume pswitch pswitch-joined cswitch Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: Playback 0 - 31 Front Left: Playback 24 [77%] [on] Capture [off] Front Right: Playback 24 [77%] [on] Capture [off] Simple mixer control 'Synth',0 .. and a whole bunch more I notice that the setup is different. Does it need to be 'pvolume' in yours? Peter -- Next meeting: Online, Jitsi, Tuesday, 2022-01-04 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
