{"id":2660,"date":"2012-02-05T23:59:05","date_gmt":"2012-02-05T21:59:05","guid":{"rendered":"http:\/\/mummila.net\/kommentit\/?p=2660"},"modified":"2012-02-05T23:59:05","modified_gmt":"2012-02-05T21:59:05","slug":"ati-rs690780-hdmi-vlc-audio-becomes-distorted-without-tsched0","status":"publish","type":"post","link":"https:\/\/mummila.net\/kommentit\/2012\/02\/05\/ati-rs690780-hdmi-vlc-audio-becomes-distorted-without-tsched0\/","title":{"rendered":"[ATI RS690\/780 HDMI] VLC audio becomes distorted without tsched=0"},"content":{"rendered":"<p><a title=\"pulseaudio distorts VLC audio\" href=\"https:\/\/bugs.launchpad.net\/bugs\/751265\">Bug #751265<\/a>\u00a0describes the symptom: when VLC uses Pulseaudio for audio output, the sound from it becomes garbled after playing for a while, with heavy digital artefacts and echoing. Comment #23 in that report suggests modifying \/etc\/pulse\/default.pa so that load-module module-udev-detect is followed by tsched=0. I&#8217;ve done that, and with it VLC seems to work fine with Pulseaudio. Furthermore, in comment #30 @David Henningsson prompted us suffering from this and with the tsched=0 workaround working to file our own reports for each specific hardware. This is my report.<\/p>\n<p>I believe apport adds data about the hardware automatically. I&#8217;ll add to that that for me this only occurs with the Radeon HDMI output; through the analog output (via headphones) the audio works fine. As\u00a0<a title=\"[ATI HDMI] HDMI Audio Disabled by Default (since oneiric)\" href=\"https:\/\/bugs.launchpad.net\/bugs\/864735\">Bug #864735<\/a>\u00a0describes, Radeon audio is off by default in recent kernels, but I&#8217;ve re-enabled it by passing the radeon.audio=1 kernel commandline parameter.<\/p>\n<p>If I switch to ALSA output for VLC (without tsched=0), VLC audio goes mute after a while. After some time of silence it sort of fast forwards itself to get up to sync with the video again. This keeps repeating, so it&#8217;s not really a workaround.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>VLC audio becomes garbled after playing for a while. load-module module-udev-detect followed by tsched=0 fixes it. David Henningsson prompted me to report this for Radeon. Only occurs with Radeon HDMI.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8860],"tags":[3347,27,3654,2679],"class_list":["post-2660","post","type-post","status-publish","format-standard","hentry","category-vianhallintajarjestelmat","tag-ati","tag-linux","tag-radeon","tag-ubuntu","sijainti-launchpad"],"_links":{"self":[{"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/posts\/2660","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/comments?post=2660"}],"version-history":[{"count":2,"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/posts\/2660\/revisions"}],"predecessor-version":[{"id":2662,"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/posts\/2660\/revisions\/2662"}],"wp:attachment":[{"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/media?parent=2660"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/categories?post=2660"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mummila.net\/kommentit\/wp-json\/wp\/v2\/tags?post=2660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}