I have new information about this issue. I went back to Windows to retest (I'm typing on it now). The same thing happens as on Ubuntu - only left channel output comes out. I notice that it actually comes out on the right of the laptop. Anything that should come out of the right speaker doesn't get heard at all. Even Windows sound configuration speaker test can't work the right speaker.
The likeliest explanation appears to be that despite the specs, this specific G575 only has one speaker, which is mounted in the right hand side of the case but is recognised by software as the left speaker (possibly because it's the first one). Therefore what I really need is a way of getting Ubuntu/Alsa to treat internal speaker sound as mono and have both channels come out of the one and only speaker. Sorry for the confusion. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1901424 Title: [4383, Conexant CX20590, Speaker, Internal] Playback problem Status in alsa-driver package in Ubuntu: New Bug description: Left internal speaker works. Right doesn't. Tried the usual fixes, see for example https://itsfoss.com/fix-sound-ubuntu-1304-quick-tip/. In particular, no sign of anything being muted or turned down on a mixer. Headphones work OK. I gather this 'one speaker' (usually the right) 'doesn't work but headphones are OK' issue has been seen before on various Ubuntu builds. I'm on 20.04 having recently upgraded. Ubuntu is running from a USB stick. The hard disk has Windows 10 on it, and that works; from which I conclude that this isn't a hardware fault. I can't find any reference to a proprietary driver being required; as far as I understood it the thinking seemed to be that with a sufficient kernel this hardware should work on Linux with no problems. I only really stumbled across this kind of by accident, so I don't know how long this machine has had the bug on it. I have a vague recollection from ages ago of having noticed it before. You probably have all this from the automated probe, however... (see below) I'm a bit puzzled about the references to rear speakers. There's one each side as I understand it, though I can't actually see the things and there appear to be some references to some G575s only having one speaker. This spec seems to say two: https://www.cnet.com/products/lenovo-essential-g575/ and so does this one: https://laptops-specs.blogspot.com/2011/06/lenovo-g575-specs.html I'd be quite happy with the speakers playing mono from the left side if that was possible, as long as the headphones were still stereo. Description: Ubuntu 20.04.1 LTS Release: 20.04 System: Host: Ubuntu-SanDisk Kernel: 5.4.0-52-generic x86_64 bits: 64 Console: tty 0 Distro: Ubuntu 20.04.1 LTS (Focal Fossa) Machine: Type: Laptop System: LENOVO product: 4383 v: Lenovo G575 serial: 2780751900857 Mobo: LENOVO model: Inagua serial: CB11824372 BIOS: LENOVO v: 41CN26WW(V2.02) date: 09/14/2011 Audio: Device-1: AMD SBx00 Azalia driver: snd_hda_intel Sound Server: ALSA v: k5.4.0-52-generic amixer version 1.2.2 default Playback/recording through the PulseAudio sound server surround21 2.1 Surround output to Front and Subwoofer speakers surround40 4.0 Surround output to Front and Rear speakers surround41 4.1 Surround output to Front, Rear and Subwoofer speakers surround50 5.0 Surround output to Front, Center and Rear speakers surround51 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers null Discard all samples (playback) or generate zero samples (capture) samplerate Rate Converter Plugin Using Samplerate Library speexrate Rate Converter Plugin Using Speex Resampler jack JACK Audio Connection Kit oss Open Sound System pulse PulseAudio Sound Server upmix Plugin for channel upmix (4,6,8) vdownmix Plugin for channel downmix (stereo) with a simple spacialization sysdefault:CARD=SB HDA ATI SB, CX20590 Analog Default Audio Device front:CARD=SB,DEV=0 HDA ATI SB, CX20590 Analog Front speakers surround21:CARD=SB,DEV=0 HDA ATI SB, CX20590 Analog 2.1 Surround output to Front and Subwoofer speakers surround40:CARD=SB,DEV=0 HDA ATI SB, CX20590 Analog 4.0 Surround output to Front and Rear speakers surround41:CARD=SB,DEV=0 HDA ATI SB, CX20590 Analog 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=SB,DEV=0 HDA ATI SB, CX20590 Analog 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=SB,DEV=0 HDA ATI SB, CX20590 Analog 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71:CARD=SB,DEV=0 HDA ATI SB, CX20590 Analog 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers dmix:CARD=SB,DEV=0 HDA ATI SB, CX20590 Analog Direct sample mixing device dsnoop:CARD=SB,DEV=0 HDA ATI SB, CX20590 Analog Direct sample snooping device hw:CARD=SB,DEV=0 HDA ATI SB, CX20590 Analog Direct hardware device without any conversions plughw:CARD=SB,DEV=0 HDA ATI SB, CX20590 Analog Hardware device with all software conversions usbstream:CARD=SB HDA ATI SB USB Stream Output ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65 Uname: Linux 5.4.0-52-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.10 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: michael 1697 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sun Oct 25 16:27:27 2020 InstallationDate: Installed on 2017-03-08 (1326 days ago) InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:SB failed Symptom_Card: Built-in Audio - HDA ATI SB Symptom_Jack: Speaker, Internal Symptom_Type: Only some of outputs are working Title: [4383, Conexant CX20590, Speaker, Internal] Playback problem UpgradeStatus: Upgraded to focal on 2020-10-18 (6 days ago) dmi.bios.date: 09/14/2011 dmi.bios.vendor: LENOVO dmi.bios.version: 41CN26WW(V2.02) dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: Inagua dmi.board.vendor: LENOVO dmi.board.version: Base Board Version dmi.chassis.asset.tag: Chassis Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Chassis Manufacturer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnLENOVO:bvr41CN26WW(V2.02):bd09/14/2011:svnLENOVO:pn4383:pvrLenovoG575:rvnLENOVO:rnInagua:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion: dmi.product.family: IDEAPAD dmi.product.name: 4383 dmi.product.sku: 123456789 dmi.product.version: Lenovo G575 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1901424/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
