Re: [Line6linux-devel] UX2 - sysinfo

[Stefan H. <ste...@gm...>]

On Fri, Dec 9, 2011 at 1:36 AM, Markus Grabner <gr...@ic...> wrote:
> On Thursday 08 December 2011 20:48:02 Stefan Hajnoczi wrote:
>> On Thu, Dec 8, 2011 at 4:44 PM, Petter S. Storvik
>>
>> <pet...@gm...> wrote:
>> > One more thing is; I cant start up computer if device is plugged in. Some
>> > sort of error and it goes to text-mode, and then I have to restart
>> > without the device. But all seems right if I plug it in after startup.
>>
>> This sounds like a kernel panic which can happen if an unexpected
>> error occurs when the driver is running.  There is typically a lot of
>> text on the screen and it can contain information that allows
>> developers to fix the bug that caused the panic.  If you have a camera
>> on your phone or digital camera, would you be able to capture the
>> error screen?
>>
>> I'm guessing that the kernel panic has nothing to do with recording
>> not working, they are probably different issues but there's a chance
>> they are related.
> Yes, indeed, someone recently moved the buffer allocation from
> line6_pcm_start() to snd_line6_[capture|playback]_hw_params :-) However, when
> a TonePort device is plugged in, the driver launches a PCM capture and
> playback stream to provide a software monitor. This is not related to ALSA and
> therefore bypasses ALSA initialization, thus trying to access a buffer via a
> pointer which is still null, resulting in the kernel panic.

My bad, sorry for the breakage.

Stefan