> Date: Sun, 24 Aug 2008 19:58:35 -0300
> Subject: New driver em28xx-audioep
> I tested the new driver em28xx-audioep with Kaiomy TVnPC U2 (this device is 
> similar to Kworld 300U) and now it's working perfectly.
>
> But to get it working, I had to disable OSS Mixed API and OSS PCM API from 
> alsa driver. If it is enabled, em28xx-audioep crashes with the following 
> stack trace:
>
> [<ffffffff804b87c1>] ? snd_pcm_open_substream+0x46/
> 0x88
> [<ffffffff80551a64>] ? mutex_lock+0xd/0x1e
> [<ffffffff804b88d4>] ? snd_pcm_open+0xd1/0x1ee
> [<ffffffff8023bac0>] ? default_wake_function+0x0/0xe
> [<ffffffff804ad323>] ? snd_lookup_minor_data+0x47/0x4f
> [<ffffffff804ad6a0>] ? snd_open+0xe8/0x151
> [<ffffffff80292e28>] ? chrdev_open+0x154/0x189
> [<ffffffff80292cd4>] ? chrdev_open+0x0/0x189
> [<ffffffff8028eec5>] ? __dentry_open+0x124/0x23b
> [<ffffffff8029a41b>] ? do_filp_open+0x3b7/0x78d
> [<ffffffff8028ec01>] ? get_unused_fd_flags+0x71/0x115
> [<ffffffff8028eceb>] ? do_sys_open+0x46/0xca
> [<ffffffff8022030a>] ? system_call_after_swapgs+0x8a/0x8f
>
> My kernel is 2.6.26-gentoo and the options I disabled are:
>
> Device Drivers  ---> Sound  ---> Advanced Linux Sound Architecture  ---> < >  
>  OSS Mixer API
> Device Drivers  ---> Sound  ---> Advanced Linux Sound Architecture  ---> < >  
>  OSS PCM (digital audio) API
> Device Drivers  ---> Sound  ---> Advanced Linux Sound Architecture  ---> [ ]  
>    OSS PCM (digital audio) API - Include plugin system (NEW)
>
>

I can confirm this, also the other em28xx-audio.ko module is affected
by this problem.

thanks alot,
Markus
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