Date: Tue, 19 Jan 2016 21:54:23 -0600 From: Karl Denninger <karl@denninger.net> To: freebsd-arm@freebsd.org Subject: Re: [Bug 205979] Raspberry Pi2 loses audio after some time Message-ID: <569F04EF.2020005@denninger.net> In-Reply-To: <bug-205979-7@https.bugs.freebsd.org/bugzilla/> References: <bug-205979-7@https.bugs.freebsd.org/bugzilla/>
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This is a cryptographically signed message in MIME format. --------------ms030108040701070600060307 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Update as posted on bugzilla. This *appears* to be related to some other bcm driver that is inappropriately masking the audio interrupt (or otherwise tampering with how it is handled.) The reason I believe this to be the case is that I set up a test machine and ran a full 48 hours of a shell script looping audio out via mpg321 without incident. The machine was otherwise idle. However, in regular use where the SD card is active and so are USB devices and the wired network interface within a few hours the audio interface goes "mute" as described in the bug report. Since the console is reporting a missing interrupt, this points toward the possibility of some other bcm2835 driver masking the audio interrupt accidentally (and inappropriately). I'm looking through the code for potential sources but have yet to find anything obvious...... On 1/6/2016 13:27, bugzilla-noreply@freebsd.org wrote: > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D205979 > > Bug ID: 205979 > Summary: Raspberry Pi2 loses audio after some time > Product: Base System > Version: 11.0-CURRENT > Hardware: arm > OS: Any > Status: New > Severity: Affects Many People > Priority: --- > Component: arm > Assignee: freebsd-arm@FreeBSD.org > Reporter: karl@denninger.net > > After some (relatively short) period of time on 11-Current with the Ras= pberry > Pi2 audio fails in a "mute" state. Some programs attempting to access = audio > (e.g. mpg321) will print a diagnostic on the console, others (e.g. espe= ak) > simply hang. > > If there is a diagnostic it is of the form: > > pcm0: chn_write(): pcm0:virtual:dsp0.vp0: play interrupt timeout, chann= el dead > > There appears to be no way to clear this condition once it occurs other= than a > reboot. > --=20 Karl Denninger karl@denninger.net <mailto:karl@denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------ms030108040701070600060307 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC Bl8wggZbMIIEQ6ADAgECAgEpMA0GCSqGSIb3DQEBCwUAMIGQMQswCQYDVQQGEwJVUzEQMA4G A1UECBMHRmxvcmlkYTESMBAGA1UEBxMJTmljZXZpbGxlMRkwFwYDVQQKExBDdWRhIFN5c3Rl bXMgTExDMRwwGgYDVQQDExNDdWRhIFN5c3RlbXMgTExDIENBMSIwIAYJKoZIhvcNAQkBFhND dWRhIFN5c3RlbXMgTExDIENBMB4XDTE1MDQyMTAyMjE1OVoXDTIwMDQxOTAyMjE1OVowWjEL MAkGA1UEBhMCVVMxEDAOBgNVBAgTB0Zsb3JpZGExGTAXBgNVBAoTEEN1ZGEgU3lzdGVtcyBM TEMxHjAcBgNVBAMTFUthcmwgRGVubmluZ2VyIChPQ1NQKTCCAiIwDQYJKoZIhvcNAQEBBQAD ggIPADCCAgoCggIBALmEWPhAdphrWd4K5VTvE5pxL3blRQPyGF3ApjUjgtavqU1Y8pbI3Byg XDj2/Uz9Si8XVj/kNbKEjkRh5SsNvx3Fc0oQ1uVjyCq7zC/kctF7yLzQbvWnU4grAPZ3IuAp 3/fFxIVaXpxEdKmyZAVDhk9az+IgHH43rdJRIMzxJ5vqQMb+n2EjadVqiGPbtG9aZEImlq7f IYDTnKyToi23PAnkPwwT+q1IkI2DTvf2jzWrhLR5DTX0fUYC0nxlHWbjgpiapyJWtR7K2YQO aevQb/3vN9gSojT2h+cBem7QIj6U69rEYcEDvPyCMXEV9VcXdcmW42LSRsPvZcBHFkWAJqMZ Myiz4kumaP+s+cIDaXitR/szoqDKGSHM4CPAZV9Yh8asvxQL5uDxz5wvLPgS5yS8K/o7zDR5 vNkMCyfYQuR6PAJxVOk5Arqvj9lfP3JSVapwbr01CoWDBkpuJlKfpQIEeC/pcCBKknllbMYq yHBO2TipLyO5Ocd1nhN/nOsO+C+j31lQHfOMRZaPQykXVPWG5BbhWT7ttX4vy5hOW6yJgeT/ o3apynlp1cEavkQRS8uJHoQszF6KIrQMID/JfySWvVQ4ksnfzwB2lRomrdrwnQ4eG/HBS+0l eozwOJNDIBlAP+hLe8A5oWZgooIIK/SulUAsfI6Sgd8dTZTTYmlhAgMBAAGjgfQwgfEwNwYI KwYBBQUHAQEEKzApMCcGCCsGAQUFBzABhhtodHRwOi8vY3VkYXN5c3RlbXMubmV0Ojg4ODgw CQYDVR0TBAIwADARBglghkgBhvhCAQEEBAMCBaAwCwYDVR0PBAQDAgXgMCwGCWCGSAGG+EIB DQQfFh1PcGVuU1NMIEdlbmVyYXRlZCBDZXJ0aWZpY2F0ZTAdBgNVHQ4EFgQUxRyULenJaFwX RtT79aNmIB/u5VkwHwYDVR0jBBgwFoAUJHGbnYV9/N3dvbDKkpQDofrTbTUwHQYDVR0RBBYw FIESa2FybEBkZW5uaW5nZXIubmV0MA0GCSqGSIb3DQEBCwUAA4ICAQBPf3cYtmKowmGIYsm6 eBinJu7QVWvxi1vqnBz3KE+HapqoIZS8/PolB/hwiY0UAE1RsjBJ7yEjihVRwummSBvkoOyf G30uPn4yg4vbJkR9lTz8d21fPshWETa6DBh2jx2Qf13LZpr3Pj2fTtlu6xMYKzg7cSDgd2bO sJGH/rcvva9Spkx5Vfq0RyOrYph9boshRN3D4tbWgBAcX9POdXCVfJONDxhfBuPHsJ6vEmPb An+XL5Yl26XYFPiODQ+Qbk44Ot1kt9s7oS3dVUrh92Qv0G3J3DF+Vt6C15nED+f+bk4gScu+ JHT7RjEmfa18GT8DcT//D1zEke1Ymhb41JH+GyZchDRWtjxsS5OBFMzrju7d264zJUFtX7iJ 3xvpKN7VcZKNtB6dLShj3v/XDsQVQWXmR/1YKWZ93C3LpRs2Y5nYdn6gEOpL/WfQFThtfnat HNc7fNs5vjotaYpBl5H8+VCautKbGOs219uQbhGZLYTv6okuKcY8W+4EJEtK0xB08vqr9Jd0 FS9MGjQE++GWo+5eQxFt6nUENHbVYnsr6bYPQsZH0CRNycgTG9MwY/UIXOf4W034UpR82TBG 1LiMsYfb8ahQJhs3wdf1nzipIjRwoZKT1vGXh/cj3gwSr64GfenURBxaFZA5O1acOZUjPrRT n3ci4McYW/0WVVA3lDGCBRMwggUPAgEBMIGWMIGQMQswCQYDVQQGEwJVUzEQMA4GA1UECBMH RmxvcmlkYTESMBAGA1UEBxMJTmljZXZpbGxlMRkwFwYDVQQKExBDdWRhIFN5c3RlbXMgTExD MRwwGgYDVQQDExNDdWRhIFN5c3RlbXMgTExDIENBMSIwIAYJKoZIhvcNAQkBFhNDdWRhIFN5 c3RlbXMgTExDIENBAgEpMA0GCWCGSAFlAwQCAwUAoIICTTAYBgkqhkiG9w0BCQMxCwYJKoZI hvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0xNjAxMjAwMzU0MjNaME8GCSqGSIb3DQEJBDFCBEDx w6xJgsvgNXh0EGzcpIDOqKUXkm11eLN8WDbO5uXiFZgsqF0n8JGEroV+Z75TwtQhRuPvYF1o SKRoreENYhDnMGwGCSqGSIb3DQEJDzFfMF0wCwYJYIZIAWUDBAEqMAsGCWCGSAFlAwQBAjAK BggqhkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYIKoZIhvcNAwICAUAwBwYFKw4DAgcwDQYI KoZIhvcNAwICASgwgacGCSsGAQQBgjcQBDGBmTCBljCBkDELMAkGA1UEBhMCVVMxEDAOBgNV BAgTB0Zsb3JpZGExEjAQBgNVBAcTCU5pY2V2aWxsZTEZMBcGA1UEChMQQ3VkYSBTeXN0ZW1z IExMQzEcMBoGA1UEAxMTQ3VkYSBTeXN0ZW1zIExMQyBDQTEiMCAGCSqGSIb3DQEJARYTQ3Vk YSBTeXN0ZW1zIExMQyBDQQIBKTCBqQYLKoZIhvcNAQkQAgsxgZmggZYwgZAxCzAJBgNVBAYT AlVTMRAwDgYDVQQIEwdGbG9yaWRhMRIwEAYDVQQHEwlOaWNldmlsbGUxGTAXBgNVBAoTEEN1 ZGEgU3lzdGVtcyBMTEMxHDAaBgNVBAMTE0N1ZGEgU3lzdGVtcyBMTEMgQ0ExIjAgBgkqhkiG 9w0BCQEWE0N1ZGEgU3lzdGVtcyBMTEMgQ0ECASkwDQYJKoZIhvcNAQEBBQAEggIAY+MSbtRV KIOjE4KwPprUXwWPdC8UGLEeBp0skMgObevBduQzpiYWAcnG1FNrfQO6NkA+Ryeb+8WugI6G SBlU5uiUWzPcULkdZHXAgLwl+rzWGB+RskJuNS61vLa+SMRlQRliFzZpW5F+jlfQA1PBQ+67 /e/aMDarATqbWTPgZd5djkJeHVIiyFMXbr0IGCLAnXdYZ32EQUMIz0eUUZupA/NXOZimo0mw mb9CZHFdS5gHKnQD4gPcjWMkQcv2Qy4uIxsKMCCq7RQrpww/N6OCu2/LSjZRLyAGtsrPt9V+ +j2+Vs5aYL+sCqrDLdTSaxpeRQZLwYWOIWcQ7qDminVwU75a/5BXdYeFatsEuyAvHL1TWyR6 U0gXVHNxmVmQKeDfdRGi/pFqonL65oBmTusJ89MD7CqPpZprqqx7fxz4fd0WcVv3/Hez6RtV kzEMZrLx5kzWu+tmDSEoJFzO8YFHkEaVFRB2EmWSo0QWDbcvc16VBGHFzYGV6zl6xLdZ5eVT 6E75FR7awAMzSufl7GSC/z1Bn60hlVfAuFAp7Dv+/DlYdBFVepQdnr3i+CfvOxfwTgX1j6Q6 yxRIa2WW7mEsN1aotCseaUdbfo0KCcL6BriWC4ouT/XiRYrOqiSjP58HMASMPH9ezWODE6PP 58PnCE9Udw+f+lWKxteJndR5ePQAAAAAAAA= --------------ms030108040701070600060307--
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