[Ubuntu Wiki] Update of "DebuggingSoundProblems" by mterry
Ubuntu Wiki
noreply at ubuntu.com
Thu Oct 27 20:10:48 UTC 2011
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The "DebuggingSoundProblems" page has been changed by mterry:
http://wiki.ubuntu.com/DebuggingSoundProblems?action=diff&rev1=66&rev2=67
Comment:
Remove some more references to obsolete releases
= Basic troubleshooting =
- Running Lucid (10.04) or later? There is a troubleshooter that checks for some of the most common problems. Open a Terminal (Program -> Accessories -> Terminal), then enter this command:
+ There is a troubleshooter that checks for some of the most common problems. Press Alt+F2, then enter this command:
{{{
ubuntu-bug audio
}}}
== Preliminary checks ==
- 1. Is your sound system plugged in and switched on. I spent an hour trying to diagnose a sound issue when the problem was that I had switched off the speakers to answer a phone call and forgot that I had done so. :-(
+ 1. Is your sound system plugged in and switched on? I spent an hour trying to diagnose a sound issue when the problem was that I had switched off the speakers to answer a phone call and forgot that I had done so. :-(
- 2. Is your speaker or microphone muted? Check here (9.10 and later) :
+ 2. Is your speaker or microphone muted? Check here:
* [[Audio/CheckForMutedSpeakerVolume|Check for muted speaker]]
* [[Audio/CheckForMutedMicrophone|Check for muted microphone]]
== Checking volume levels ==
- Before messing around with uninstalling and installing various sound programs to fix a problem, check your volume levels. It is often the case that a muted channel is the problem, even though the description may not sound immediately relevant. In this regard, muted Surround or Center channels are common culprits. So unmute and raise the volume of one channel at a time and check whether sound is then produced by a running sound application e.g. Rhythmbox.
+ Before messing around with uninstalling and installing various sound programs to fix a problem, check your volume levels. It is often the case that a muted channel is the problem, even though the description may not sound immediately relevant. In this regard, muted Surround or Center channels are common culprits. So unmute and raise the volume of one channel at a time and check whether sound is then produced by a running sound application e.g. Banshee.
You can access the volume levels for the various channels from the command line or the GUI.
@@ -31, +31 @@
1. From GUI: This can be done by running something like ''gnome-alsamixer'' from a terminal window or navigating to your your Volume Control. Then unmute as described above. Also check that your switches are set correctly - for instance that if you use the analog output the analog switch is set ON or that the digital or S/PDIF switch is set OFF. You can select which tracks/switches are visible in Volume Control (see above) under Edit->Preferences.
* Note: These controls have equivalent functionality to alsamixer but with a graphical interface. Checking or unchecking devices in the these accomplishes the exact same thing as unmuting or muting devices, respectively, in alsamixer.
- * Starting with Ubuntu 7.04, the sound volume control is also accessible from Menu->Sound&Video->Volume Control. It may be hidden in your menus but can be shown by going to System > Preferences > Main Menu and under Applications > Sound&Video ticking Volume Control.
+ * The sound volume control is also accessible from Menu->Sound&Video->Volume Control. It may be hidden in your menus but can be shown by going to System > Preferences > Main Menu and under Applications > Sound&Video ticking Volume Control.
== Checking sound device assignment ==
@@ -43, +43 @@
* {{{
options snd slots=,snd-usb-audio
}}}
- The index numbers (0, 1, ... 7) signify the priority of the device, with the highest priority device being 0, then 1, and so forth. In theory, applications should first attempt to use the highest priority device first, but if for some reason the application is unable to use the device, it will use the next highest priority device. For example, if you have a USB sound card that can get picked up with OSS, which browsers, flash, and skype may not output, if you set your USB card at first priority, it will play when using, say, Rhythmbox, but your other applications will play through your other soundcard. For more information see Documentation/sound/alsa/ALSA-Configuration.txt in the kernel source.
+ The index numbers (0, 1, ... 7) signify the priority of the device, with the highest priority device being 0, then 1, and so forth. In theory, applications should first attempt to use the highest priority device first, but if for some reason the application is unable to use the device, it will use the next highest priority device. For example, if you have a USB sound card that can get picked up with OSS, which browsers, flash, and skype may not output, if you set your USB card at first priority, it will play when using, say, Banshee, but your other applications will play through your other soundcard. For more information see Documentation/sound/alsa/ALSA-Configuration.txt in the kernel source.
== Checking permissions and resources ==
@@ -58, +58 @@
Please do not report problems on this page; use the normal support channels instead. See http://www.ubuntu.com/support
If you feel you have encountered a software bug, the way to report it varies between versions.
- For Ubuntu Lucid Lynx (10.04) and later, run the following terminal command:
+ Run the following terminal command:
{{{
ubuntu-bug audio
}}}
- For Ubuntu Karmic (9.10), run the following terminal command:
- {{{
- ubuntu-bug -p alsa-base
- }}}
-
This will submit a detailed bug report with information about your current system.
- For older versions, or if the above fails for some reason, you can file a bug report, then upload alsa-info information [[Audio/AlsaInfo|according to these instructions]].
+ If the above fails for some reason, you can file a bug report, then upload alsa-info information [[Audio/AlsaInfo|according to these instructions]].
== Triaging sound bugs ==
More information about the Ubuntu-bugsquad
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