Bug 47461
| Summary: | Intel HD: Sound is distorted | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Ralf (post+kernel) |
| Component: | Sound(ALSA) | Assignee: | Takashi Iwai (tiwai) |
| Status: | RESOLVED CODE_FIX | ||
| Severity: | normal | CC: | florian, tiwai |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 3.6-rc5 | Subsystem: | |
| Regression: | Yes | Bisected commit-id: | |
| Attachments: | Fix patch | ||
Try to pass position_fix=2 to snd-hda-intel module. There was a similar bug report with ASUS K53E, and choosing this option helped. Indeed this option seems to help. Thanks! What does that mean now? Is this still a bug, or will this quirk be used automatically on affected HW? We need a new quirk entry. Could you try the patch below, remove position_fix option again, and see whether it works? Created attachment 80081 [details]
Fix patch
Looking good so far. The path did not apply cleanly though as I don't have the ASUS K53E line. Also, it may be more appropriate to use "ASUS X53S" as name for the quirk: I think the entire X53S series is very similar, and the big sticker on the laptop also just says "X53S". Thanks for your quick replies! OK, now I applied the patch (with "X53S" correction) to for-linus branch so that it'll be merged to Linus tree at the next pull request. Let's close the bug now. Please reopen if you see any problem with this fix. A patch referencing this bug report has been merged in Linux v3.6-rc6: commit 64f1e00d8edb54f5d25fb0114a46050fb8340df4 Author: Takashi Iwai <tiwai@suse.de> Date: Thu Sep 13 15:28:56 2012 +0200 ALSA: hda - Yet another position_fix quirk for ASUS machines |
Using the vanilla 3.6-rc5 kernel with my Debian Wheezy system, sound is distorted: One can still recognize the sound that's supposed to be played in the distortion though. Unfortunately I don't know how to properly describe what I hear in English, please let me know if a recording would be helpful. I am using PulseAudio as sound system. The distortion happens both with KDE system sounds and when using VLC. Using the 3.2 kernel from Debian or a self-compiled vanilla 3.5.3 (and all the same userspace), sound playback is crystal clear, so this is a regression in 3.6. I can do a bisect, but I'd appreciate if someone could tell me to which directory it should be restricted - reporting this against the sound drivers is just a pure guess. All this is on an Asus X53SM. The relevant part of the lspci -v output is: 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) Subsystem: ASUSTeK Computer Inc. Device 1ac3 Flags: bus master, fast devsel, latency 0, IRQ 49 Memory at df000000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [100] Virtual Channel Capabilities: [130] Root Complex Link Kernel driver in use: snd_hda_intel