lkml.org 
[lkml]   [2010]   [Apr]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [REGRESSION bisected] Sound goes too fast due to commit 7b3a177b0
Op 14-04-10 18:01, Takashi Iwai schreef:
:
>>
>> I don't fully grasp the meaning of bdl_pos_adj, so I don't know if it's
>> a bug to not play correctly when forcing it to 0. Is it?
>
> It might be that this was for reducing the load by position
> correction mechanism. You might see the hd-audio kernel thread in a
> high CPU usage. This might be fixed also by position_fix=1, though.
Yes, I had added this option after a regression in the previous kernel
which causes the hd-audio thread to take 50% of a CPU. Eventually, it
was fixed and not needed anymore. So I guess in the case of my laptop,
this is not really a regression, because everything is fine with the
default values.

In the case of Frank, this looks more like a regression, or at least a
bug to solve, because this happens with the default options. However,
this report should be taken with care, because this happens on a
2.6.33.2 kernel made by Mandriva, containing many alsa patches of
2.6.34. Frank, how possible would it be to test a 2.6.34-rc4 kernel from
Linus?

If this bug is confirmed, Takashi, do you know any way to choose
automatically position_fix=1 when needed?

See you,
Eric


\
 
 \ /
  Last update: 2010-04-15 23:21    [W:0.107 / U:0.184 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site