Raymond,
The committer, Takashi Iwai, decided to help us. Can you use this patch
(and help me test it) :-)
Nio
-----
OK, I see why this bogus report reappears again. The message tag was
reverted back after some commit for correctness.
Now I rephrased the text again so that it won't hit some stupid daemon
any longer. It'll be included in 4.6 kernel, and then backported to
stable kernels later.
But, note that this doesn't fix the issue. For a proper fix, a patch
like below would be needed. Let me know if this works for you. (But
I have no idea about Ubuntu, so I cannot tell you how to apply the
patch, ask other Ubuntu people about it
Takashi
-- 8< --
From: Takashi Iwai at SUSE
Subject: [PATCH] ALSA: au88x0: Fix overlapped PCM pointer
au88x0 hardware seems returning the current pointer at the buffer
boundary instead of going back to zero. This results in spewing
warnings from PCM core.
This patch corrects the return value from the pointer callback within
the proper value range, just returning zero if the position is equal
or above the buffer size.
Signed-off-by: Takashi Iwai at SUSE
---
sound/pci/au88x0/au88x0_pcm.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/sound/pci/au88x0/au88x0_pcm.c b/sound/pci/au88x0/au88x0_pcm.c
index a6d6d8d0867a..df5741a78fd2 100644
--- a/sound/pci/au88x0/au88x0_pcm.c
+++ b/sound/pci/au88x0/au88x0_pcm.c
@@ -432,7 +432,10 @@ static snd_pcm_uframes_t snd_vortex_pcm_pointer(struct
snd_pcm_substream *substr
#endif
//printk(KERN_INFO "vortex: pointer = 0x%x\n", current_ptr);
spin_unlock(&chip->lock);
- return (bytes_to_frames(substream->runtime, current_ptr));
+ current_ptr = bytes_to_frames(substream->runtime, current_ptr);
+ if (current_ptr >= substream->runtime->buffer_size)
+ current_ptr = 0;
+ return current_ptr;
}
/* operators */
--
2.7.2
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1551041
Title:
snd_au8820 0000:01:04.0: BUG: , pos = 16386, buffer size = 16384,
period size = 1024
Status in alsa-driver package in Ubuntu:
Incomplete
Bug description:
Kernel oops in a new installed system, that I configuring ...
ProblemType: KernelOops
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-8-generic 4.4.0-8.23
ProcVersionSignature: Ubuntu 4.4.0-8.23-generic 4.4.2
Uname: Linux 4.4.0-8-generic i686
NonfreeKernelModules: nvidia
Annotation: Your system might become unstable now and might need to be
restarted.
ApportVersion: 2.20-0ubuntu3
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: olle 1606 F.... pulseaudio
/dev/snd/controlC0: olle 1606 F.... pulseaudio
Date: Mon Feb 29 00:00:56 2016
Failure: oops
HibernationDevice: RESUME=UUID=03bed9e9-e39b-4107-8cd6-c2612af9a6aa
InstallationDate: Installed on 2016-02-28 (0 days ago)
InstallationMedia: Lubuntu 16.04 LTS "Xenial Xerus" - Alpha i386 (20160226)
IwConfig:
enp31s0 no wireless extensions.
lo no wireless extensions.
MachineType: Hewlett-Packard HP xw8400 Workstation
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-8-generic
root=UUID=2160f8ed-4aa3-4243-b5d6-f87c1967e253 ro quiet splash
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions: kerneloops-daemon 0.12+git20090217-3ubuntu9
RfKill:
SourcePackage: linux
Title: snd_au8820 0000:01:04.0: BUG: , pos = 16386, buffer size = 16384,
period size = 1024
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/09/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 786D5 v02.37
dmi.board.name: 0A08h
dmi.board.vendor: Hewlett-Packard
dmi.board.version: NA
dmi.chassis.asset.tag: CZC722497N
dmi.chassis.type: 6
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvr786D5v02.37:bd07/09/2009:svnHewlett-Packard:pnHPxw8400Workstation:pvr:rvnHewlett-Packard:rn0A08h:rvrNA:cvnHewlett-Packard:ct6:cvr:
dmi.product.name: HP xw8400 Workstation
dmi.sys.vendor: Hewlett-Packard
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1551041/+subscriptions
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