|
|
| Line 1: |
Line 1: |
| − | == Examining the soundon.log file ==
| + | Hi there, just became alert to your blog tuohrgh Google, and found that it's really informative. I’m gonna watch out for brussels. I will appreciate if you continue this in future. Many people will be benefited from your writing. Cheers! |
| − | | + | |
| − | 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.
| + | |
| − | | + | |
| − | === Sample log file data ===
| + | |
| − | | + | |
| − | Here is some sample data taken from the <code>/var/log/soundon.log</code> file of a non-working (Kernel486) system:
| + | |
| − | | + | |
| − | Kernel vermagic: 2.6.27.10 preempt mod_unload 486 4KSTACKS
| + | |
| − | OSS vermagic: 2.6.27.10 preempt mod_unload 486 4KSTACKS
| + | |
| − |
| + | |
| − | *** Loading OSS kernel modules ***
| + | |
| − |
| + | |
| − | osscore module loaded OK
| + | |
| − | Loading module oss_solo failed - ignored
| + | |
| − |
| + | |
| − | *** Finished loading OSS kernel modules ***
| + | |
| − |
| + | |
| − | opendir: No such file or directory
| + | |
| − | SNDCTL_MIXERINFO: No such device or address
| + | |
| − | 0 audio devices
| + | |
| − | 1 mixer devices
| + | |
| − | +++ ossinfo -v3 +++
| + | |
| − | Version info: OSS 4.1 (b 1051/200901181208) (0x00040100) GPL
| + | |
| − | Platform: Linux/i486 2.6.27.10 #1 PREEMPT Sun Dec 21 02:26:32 GMT 2008 (despina)
| + | |
| − |
| + | |
| − | Number of audio devices: 0
| + | |
| − | Number of audio engines: 0
| + | |
| − | Number of mixer devices: 1
| + | |
| − |
| + | |
| − |
| + | |
| − | Device objects
| + | |
| − | 0: osscore0 OSS core services
| + | |
| − | 1: oss_solo0 ESS Solo-1
| + | |
| − |
| + | |
| − |
| + | |
| − | Mixer devices
| + | |
| − | 0: Device not available
| + | |
| − |
| + | |
| − | Audio devices
| + | |
| − | +++ /dev/sndstat +++
| + | |
| − | +++ dmesg +++
| + | |
| − | Linux version 2.6.27.10 (root@despina) (gcc version 4.1.2 (Gentoo 4.1.2 p1.1)) /
| + | |
| − | #1 PREEMPT Sun Dec 21 02:26:32 GMT 2008
| + | |
| − | PAT not supported by CPU.
| + | |
| − | PAT WC disabled due to known CPU erratum.
| + | |
| − | osscore: This processor architecture is not compatible with vmix (info=-1) - Not enabled.
| + | |
| − | PCI: setting IRQ 9 as level-triggered
| + | |
| − | oss_solo 0000:00:0a.0: found PCI INT A -> IRQ 9
| + | |
| − | BUG: unable to handle kernel NULL pointer dereference at 00000060
| + | |
| − | IP: [<d8aea7d2>] :osscore:oss_install_mixer+0x262/0x370
| + | |
| − | *pde = 00000000
| + | |
| − | Oops: 0000 [#1] PREEMPT
| + | |
| − | Modules linked in: oss_solo(+) osscore af_packet usbcore nfs lockd sunrpc /
| + | |
| − | smc_ultra 8390 bitrev crc32 mousedev rtc_cmos rtc_core rtc_lib psmouse pcspkr /
| + | |
| − | evdev ali_agp agpgart ide_floppy unix
| + | |
| − |
| + | |
| − | Pid: 2746, comm: modprobe Not tainted (2.6.27.10 #1)
| + | |
| − | EIP: 0060:[<d8aea7d2>] EFLAGS: 00010202 CPU: 0
| + | |
| − | EIP is at oss_install_mixer+0x262/0x370 [osscore]
| + | |
| − | | + | |
| − | === Diagnosis ===
| + | |
| − | | + | |
| − | 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]].
| + | |
| − | | + | |
| − | We can eliminate this fault by rebuilding the kernel with the following options:
| + | |
| − | | + | |
| − | MTRR (Memory Type Range Register) support (MTRR) [Y/n/?] n
| + | |
| − | x86 PAT support (X86_PAT) [N/y/?] n
| + | |
Hi there, just became alert to your blog tuohrgh Google, and found that it's really informative. I’m gonna watch out for brussels. I will appreciate if you continue this in future. Many people will be benefited from your writing. Cheers!
