Date: Mon, 13 Oct 2008 00:50:12 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Adam McDougall <mcdouga9@egr.msu.edu>, frank@exit.com Cc: FreeBSD-Current <freebsd-current@freebsd.org> Subject: Re: Hard crash with new snd_hda. Message-ID: <48F27114.2090405@FreeBSD.org> In-Reply-To: <1223436192.00023068.1223424004@10.7.7.3> References: <1222644184.00019171.1222632003@10.7.7.3> <1222809781.00019960.1222796402@10.7.7.3> <1223436192.00023068.1223424004@10.7.7.3>
next in thread | previous in thread | raw e-mail | index | archive | help
Adam McDougall wrote: > Alexander Motin wrote: >> Frank Mayhar wrote: >>> Fatal trap 12: page fault while in kernel mode >>> cpuid = 1; apic id = 01 >>> fault virtual address = 0x14 >>> fault code = supervisor read, page not present >>> instruction pointer = 0x20:0xc617e0f1 >>> stack pointer = 0x28:0xe80697fc >>> frame pointer = 0x28:0xe8069828 >>> code segment = base 0x0, limit 0xfffff, type 0x1b >>> = DPL 0, pres 1, def32 1, gran 1 >>> processor eflags = interrupt enabled, resume, IOPL = 0 >>> current process = 1184 (kldload) >>> trap number = 12 >>> panic: page fault >>> cpuid = 1 >>> Uptime: 54s >>> Physical memory: 2003 MB >>> Dumping 95 MB: >> >> This is probably the late consequence. I think debugging at this point >> won't give much. At least it will require deep data structures digging. >> >> You can enable some more debugging with setting hw.snd.verbose=4. May >> be it will give some clues. If not, probably we should try to add some >> debug printing near channel-to-device assignment loop near line 7170. >> We should try to find is the channel number was incorrectly set >> initially or it was erased later or channel memory itself was erased. >> >> The only idea I have now about the problem is that it may be related >> to the two audio codecs that you have on the same HDA bus. You are the >> first person who reported about such setup, so it wasn't ever tested. >> > I think I am having a similar issue, discovered it on a new model Dell > Latitude E6500. It is probably seeing a codec for HDMI and modem in > addition to the normal sound. Sound works if I patch the old hda driver > to detect my codec on 7.1, but I just got 8 installed last night. If I > have KDB_UNATTENDED and a dumpdev, it either hangs at the beginning of > the dump or reboots almost immediately after the panic. I can try to > hook up a serial or firewire console later and gather more info, but > tonight I might be too busy. In the meantime, here are two screenshots > of the panic and the backtrace: > http://www.egr.msu.edu/~mcdouga9/pics/1007081830.jpg > http://www.egr.msu.edu/~mcdouga9/pics/1007081831.jpg I have managed to artificially reproduce your situation and I think my recent patch just committed to 8-CURRENT should fix the problem. Report me the results please. -- Alexander Motin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?48F27114.2090405>