| Summary: | Phonon prevents audio device from going to power saving mode | ||
|---|---|---|---|
| Product: | [Unmaintained] phonon-backend-gstreamer | Reporter: | Alexander van Loon <a.vanloon> |
| Component: | general | Assignee: | Harald Sitter <sitter> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | martin.sandsmark, myriam, robert.ryan, sitter, tdfischer |
| Priority: | NOR | ||
| Version: | 4.4.4 | ||
| Target Milestone: | --- | ||
| Platform: | Ubuntu | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
| Attachments: |
Power Management settings 1
Power Management settings 2 Powersave profile settings 1 Powersave profile settings 2 Powersave profile settings 3 Screenshot of powertop, first Screenshot of powertop, second |
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Description
Alexander van Loon
2010-06-05 12:59:39 UTC
I can't reproduce this here on a Lenovo W500 laptop, using KDE SC 4.5.beta 1, and had no problems either with KDE SC 4.4.3 previously. Maybe updating your KDE to a more recent release could help. Please see http://kubuntu.org/news for more information. The latest release is KDE SC 4.4.4 in the Kubuntu backports PPA. Thank you for your quick response. I updated to KDE SC 4.4.4 by using Kubuntu’s Updates PPA and restarted my notebook. Unfortunately after consulting powertop, the problem is still there. Given the fact that you can’t reproduce the problem, I suspect it is a problem specific to Kubuntu (which distribution did you use to test?) or my hardware, or a combination of both. I think it would be useful to try to reproduce the problem using a different distribution on the same notebook, for example OpenSUSE and Chakra. I think I’ll do that soon, I’ll report back to tell if those distributions also give this problem. I don't think it is Kubuntu related since I also use that distribution. You should check your ACPI settings and check if you have all necessary kernel modules loaded This part I don’t understand, could you please provide more detailed instructions on how I would accomplish those two tasks? The ACPI settings are what you can set in the SystemSettings -> Power management. This can only work if the kernel module for ACPI is loaded, of course, so check the Capabilities section in the Power management. In the ‘Capabilities’ section of ‘System Settings’ → ‘Power Management’ I see the following information, after numbers of CPU’s and batteries: Supported suspend methods: Suspend to disk, Suspend to RAM DPMS Support: working ConsoliKit Runtime Support: working Status: No issues found with your configuration But I can change nothing here, so I’m missing something then? You wrote I should be able to change something there? How to make sure the kernel module is loaded? It is loaded, else you wouldn't see those options. Of course you can't change settings in Capabilities, try the Settings part. Created attachment 47934 [details]
Power Management settings 1
Created attachment 47935 [details]
Power Management settings 2
Created attachment 47936 [details]
Powersave profile settings 1
Created attachment 47937 [details]
Powersave profile settings 2
Created attachment 47938 [details]
Powersave profile settings 3
I uploaded screenshots of all the settings, hopefully this is the information which was necessary. I can see nothing wrong there, I haven’t made any modifications to the settings, they’re the default settings of Kubuntu. No need to upload all these images, I told you your kernel module was running correctly. But reading the various comments in the Launchpad bug, I don't know if this is really only Phonon related, since knotify could also be involved. We will have to dig deeper to check that out. I still can't reproduce this here, but I use the VLC backend (not released yet), which might be the difference to your settings. But since you can reproduce with both the xine and the gstreamer backend, it might not be backend related after all. I will ping the developers about that. After the last comment here, two more people reported in the Launchpad bug report that they are also affected. One user mentions though that it doesn't seem to be related to knotify or kmix. The only pattern so far seems to be that only (K)ubuntu users are affected. You mentioned you would ask the developers, what do they know? Confirmed by downstream reports. I just pinged the developer, the problem is likely a lack of time. I'm also experiencing this on the latest debian sid package. We are sorry, but the xine backend is deprecated since upstream development is stalled. Please use one of the two other backends instead. But in my first comment I also mentioned that the GStreamer backend is affected. Could the component please be changed to GStreamer then? Reassigning. Are you using pulseaudio? I'm not sure because my laptop is now sent away for repairs and it had GNOME 3 installed. When I get it back in a few days I'll check if the problem is still reproducible with the latest KDE version. Created attachment 64197 [details]
Screenshot of powertop, first
So I got my notebook back and installed the latest Kubuntu beta on it, then downloaded all updates. Now powertop gives different numbers, showing the use of the audio devices is 0% when my notebook is idle and not playing any audio.
Created attachment 64198 [details]
Screenshot of powertop, second
I'm not sure how to interpret this information, but it seems to be more evidence that the bug has now been solved, because powertop indicates that power management for the audio devices is working properly. Can the bug be closed now?
Closing at your request. If the problem resurfaces, feel free to reopen. We're pretty confident things should be fixed now though. |