If it is, try using apulseAUR, as described in Advanced Linux Sound Architecture#PulseAudio compatibility. Alternatively, killing the PulseAudio process may cause sound to start working in the desired process.
As the pulseaudio wrapper is shown as "default" in alsamixer, you may have to press F6 to select your actual soundcard first. You may also need to enable and increase the volume of Line-in in the Playback section.
Alc662 Sound Drivers For Mac
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Some applications (Pidgin, Adobe Flash) do not provide an option to change the capture device. It becomes a problem if your microphone is on a separate device (e.g. USB webcam or microphone) than your internal sound card. To change only the default capture device, leaving the default playback device as is, you can modify your /.asoundrc file to include the following:
Whether you followed simultaneous output tip or managed to get it done on your own, you might get crackling sound through headphones or external speakers. This can be fixed by muting or setting volume to 0% on item Mic. Use alsamixer or amixer:
Some modules (e.g. snd_ac97_codec and snd_hda_intel) can power off your sound card when it is not used. This can make an audible noise (like a crack/pop/scratch) when turning on/off your sound card. Sometimes even when moving the volume slider or opening and closing windows (KDE4). If you find this annoying, try modinfo your_module and look for a module option that adjusts or disables this feature.
Some combinations of ALSA drivers and chipsets may cause audio from all sources to skip when used in combination with a dynamic frequency scaling governor such as ondemand or conservative. Currently, the solution is to switch back to the performance governor.
If you are sure nothing is muted, that your drivers are installed correctly, and that your volume is right, but you still do not hear anything, then try adding the following line to /etc/modprobe.d/modprobe.conf:
Although ALSA detects your soundcard through the BIOS, at times ALSA may not be able to recognize your model type. The soundcard chip can be found in alsamixer (e.g. ALC662) and the model can be set in /etc/modprobe.d/modprobe.conf or /etc/modprobe.d/sound.conf. For example:
There are other model settings too. For most cases ALSA defaults will do. If you want to look at more specific settings for your soundcard take a look at the ALSA Soundcard List find your model, then Details, then look at the "Setting up modprobe..." section. Enter these values in /etc/modprobe.d/modprobe.conf. For example, for an Intel AC97 audio:
If aplay does not output any errors, but still no sound is heard, "reboot" the receiver, monitor or tv set. Since the HDMI interface executes a handshake on connection, it might have noticed before that there was no audio stream embedded, and disabled audio decoding. If you are using a standalone window manager, you may need to have sound playing while plugging in the HDMI cable.
If you are having problems with simultaneous playback, and if PulseAudio is installed, its default configuration is set to "hijack" the soundcard. Some users of ALSA may not want to use PulseAudio and are quite content with their current ALSA settings. One fix is to edit /etc/asound.conf and comment out the following lines:
The alsa-utils package provides alsa-store.service which automatically stores the current ALSA state to /var/lib/alsa/asound.state upon system shutdown. This can be problematic for users who are trying to reset their current ALSA state as the asound.state file will be recreated with the current state upon every shutdown (e.g., attempting to remove user-defined channels from the mixer). The alsa-store.service service may be temporarily disabled by creating the following empty file:
If you want to clean ALSA state without rebooting, you can use rmmod to remove the sound driver module, then manually delete the unwanted entries in asound.state, and then use modprobe to reinstall the sound driver module.
You might find that only one user can use the dmixer at a time. This is probably ok for most, but for those who run mpd as a separate user this poses a problem. When mpd is playing a normal user cannot play sounds though the dmixer. While it is quite possible to just run mpd under a user's login account, another solution has been found. Adding the line ipc_key_add_uid 0 to the pcm.dmixer block disables this locking. The following is a snippet from asound.conf, the rest is the same as above.
For rare situations where you have 2 sounds cards(ex. onboard Realtek and an external PCIe card), you may want to avoid AppleALC patching devices you either don't use or don't need patching(like native PCIe cards). This is especially important if you find that AppleALC will not patch you onboard audio controller when the external one is present.
It is highly recommended to always use the most recent driver version available. Do not forget to check with our site as often as possible in order to stay updated on the latest drivers, software and games. Please set a system restore point before installing a device driver. This will help if you installed a wrong driver. Problems can arise when your hardware device is too old or not supported any longer.
The Realtek HD Definition Audio Driver is the popular sound driver for Windows. It helps choose the audio configuration for the speaker system, and the software also allows adjusting the volume for individual speakers.
The easiest way to fix a corrupted Realtek driver is to reinstall and update the driver. You can do it manually through Device Manager or use Advanced Driver Updater, a driver updating tool, to update corrupt and problematic drivers.
These tables are very often incorrect, and are overridden by the Windows driver shipped by mainboard manufacturer or the chip supplier. Thus with these drivers installed, in Windows this table has no effect. The recommendation to update BIOS and then update the driver is a catch-all. Updating the BIOS will fix audio for people running the generic driver which relies on BIOS tables, and updating the mainboard specific driver will undo the damage that the prior version of the driver might have done.
On Linux in the last 10 years, pretty much all issues with Intel HD Audio compatible sound chip support has been traced back to incorrect verb tables, and the distribution drivers attempt to detect mainboards and soundchips and apply corrected tables themselves.
Accepted nvidia-graphics-drivers-450-server into focal-proposed. The package will build now and be available at +source/nvidia-graphics-drivers-450-server/450.51.06-0ubuntu0.20.04.1 in a few hours, and then in the -proposed repository.
Accepted nvidia-graphics-drivers-450-server into bionic-proposed. The package will build now and be available at +source/nvidia-graphics-drivers-450-server/450.51.06-0ubuntu0.18.04.1 in a few hours, and then in the -proposed repository.
Accepted nvidia-graphics-drivers-450-server into focal-proposed. The package will build now and be available at +source/nvidia-graphics-drivers-450-server/450.51.06-0ubuntu0.20.04.2 in a few hours, and then in the -proposed repository.
Accepted nvidia-graphics-drivers-450-server into bionic-proposed. The package will build now and be available at +source/nvidia-graphics-drivers-450-server/450.51.06-0ubuntu0.18.04.2 in a few hours, and then in the -proposed repository.
The verification of the Stable Release Update for nvidia-graphics-drivers-450 has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions. 2ff7e9595c
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