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| − | == Examining the soundon.log file ==
| + | Гонялись (и гоняются) коды вида Numeric Weather Simulation. На x86_64 это Infiniband кластер, а на IA64 это SGI Altix 4700. Дровишки --- из конторы которая поменяла dropped "e" в своем логотипе. |
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| − | If there is a problem occuring with the open sound system, it is possible that diagnostic information has been written to the system log files that may help to [[troubleshoot]] the cause.
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| − | === Sample log file data ===
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| − | Here is some sample data taken from the <code>/var/log/soundon.log</code> file of a non-working (Kernel486) system:
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| − | Kernel vermagic: 2.6.27.10 preempt mod_unload 486 4KSTACKS
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| − | OSS vermagic: 2.6.27.10 preempt mod_unload 486 4KSTACKS
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| − |
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| − | *** Loading OSS kernel modules ***
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| − |
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| − | osscore module loaded OK
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| − | Loading module oss_solo failed - ignored
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| − | *** Finished loading OSS kernel modules ***
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| − |
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| − | opendir: No such file or directory
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| − | SNDCTL_MIXERINFO: No such device or address
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| − | 0 audio devices
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| − | 1 mixer devices
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| − | +++ ossinfo -v3 +++
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| − | Version info: OSS 4.1 (b 1051/200901181208) (0x00040100) GPL
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| − | Platform: Linux/i486 2.6.27.10 #1 PREEMPT Sun Dec 21 02:26:32 GMT 2008 (despina)
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| − |
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| − | Number of audio devices: 0
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| − | Number of audio engines: 0
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| − | Number of mixer devices: 1
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| − |
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| − | Device objects
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| − | 0: osscore0 OSS core services
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| − | 1: oss_solo0 ESS Solo-1
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| − |
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| − |
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| − | Mixer devices
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| − | 0: Device not available
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| − |
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| − | Audio devices
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| − | +++ /dev/sndstat +++
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| − | +++ dmesg +++
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| − | Linux version 2.6.27.10 (root@despina) (gcc version 4.1.2 (Gentoo 4.1.2 p1.1)) /
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| − | #1 PREEMPT Sun Dec 21 02:26:32 GMT 2008
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| − | PAT not supported by CPU.
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| − | PAT WC disabled due to known CPU erratum.
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| − | osscore: This processor architecture is not compatible with vmix (info=-1) - Not enabled.
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| − | PCI: setting IRQ 9 as level-triggered
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| − | oss_solo 0000:00:0a.0: found PCI INT A -> IRQ 9
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| − | BUG: unable to handle kernel NULL pointer dereference at 00000060
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| − | IP: [<d8aea7d2>] :osscore:oss_install_mixer+0x262/0x370
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| − | *pde = 00000000
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| − | Oops: 0000 [#1] PREEMPT
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| − | Modules linked in: oss_solo(+) osscore af_packet usbcore nfs lockd sunrpc /
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| − | smc_ultra 8390 bitrev crc32 mousedev rtc_cmos rtc_core rtc_lib psmouse pcspkr /
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| − | evdev ali_agp agpgart ide_floppy unix
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| − |
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| − | Pid: 2746, comm: modprobe Not tainted (2.6.27.10 #1)
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| − | EIP: 0060:[<d8aea7d2>] EFLAGS: 00010202 CPU: 0
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| − | EIP is at oss_install_mixer+0x262/0x370 [osscore]
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| − | === Diagnosis ===
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| − | In the above example, we can see PAT not supported by CPU. PAT WC disabled due to known CPU erratum. It turns out in this instance that there is a [[PAT]] related bug in the kernel, which is causing the [[segmentation fault]].
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| − | We can eliminate this fault by rebuilding the kernel with the following options:
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| − | MTRR (Memory Type Range Register) support (MTRR) [Y/n/?] n
| + | |
| − | x86 PAT support (X86_PAT) [N/y/?] n
| + | |
Гонялись (и гоняются) коды вида Numeric Weather Simulation. На x86_64 это Infiniband кластер, а на IA64 это SGI Altix 4700. Дровишки --- из конторы которая поменяла dropped "e" в своем логотипе.
