Bug 169602
Summary: | VoIP sound input distorted | ||
---|---|---|---|
Product: | [Fedora] Fedora | Reporter: | Stefan Becker <chemobejk> |
Component: | kernel | Assignee: | Dave Jones <davej> |
Status: | CLOSED WORKSFORME | QA Contact: | Brian Brock <bbrock> |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | 4 | CC: | pfrields, wtogami |
Target Milestone: | --- | ||
Target Release: | --- | ||
Hardware: | i686 | ||
OS: | Linux | ||
URL: | https://sourceforge.net/projects/bluetooth-alsa/ | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2005-12-05 05:15:56 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
Stefan Becker
2005-09-30 05:51:59 UTC
Please report this to the upstream maintainers of that module. Just for the fun of it I retested the new kernel with a normal USB Headset: Same problem. So it's not related to bluetooth-alsa, it's the kernel -> REOPENED. Based on the retest we can now narrow it down to the following subcomponents: [kphone] [alsa-lib] ALSA kernel stack [snd_usb_audio module (provides the "sound card")] USB kernel stack uhci_hcd module [USB 1.1 Headset] Retested with kernel-2.6.13-1.1532_FC4: Still the same problem. Mass update to all FC4 bugs: An update has been released (2.6.14-1.1637_FC4) which rebases to a new upstream kernel (2.6.13.2). As there were ~3500 changes upstream between this and the previous kernel, it's possible your bug has been fixed already. Please retest with this update, and update this bug if necessary. Thanks. Retested with kernel-2.6.14-1.1637_FC4: Still the same problem. It maybe that only kphone is affected by this. A simple recording loop arecord -Dplughw:2 | aplay -Dplughw:2 doesn't have this problem. That could mean that the actual problem might be network stack related, ie. delayed or dropped packets. Retested with kernel-2.6.14-1.1644_FC4: Still the same problem. Recompilation of kphone didn't help either, as I expected... Found another VoIP/SIP application to test with: Twinkle (http://www.twinklephone.com). It exhibits the same problem as kphone under kernel >2.6.12. In light of my test results I've updated the summary again. I've now compiled a plain 2.6.14.3 kernel using the config from the kernel-2.6.14-1.1644_FC4: this kernel does *not* exhibit the problem. So it must be caused by a Fedora patch. [LATER] Argggg... Now twinkle works OK on kernel-2.6.14-1.1644_FC4. Don't ask me why. It didn't when I first tested it and exhibited the same problem as kphone. I shutdown the computer completely and removed the power cord, but somehow I can't reproduce the error with twinkle anymore :-[ kphone on the other hand has the problem also on the plain 2.6.14.3 kernel with FC4 config. So it's something the kernel does which makes kphone stumble on sound input. Maybe kphone does something stupid which worked OK until 2.6.12... I'll resolve the bug as WORKSFORME for now as I have a working alternative. |