linux-kernel - Re: next-0519 on thinkpad x60: sound related? window manager crash

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Date:   Sat, 13 Jun 2020 12:25:22 -0400
From:   "Alex Xu (Hello71)" <alex_y_xu@...oo.ca>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     alsa-devel@...a-project.org, bp@...en8.de, hch@...radead.org,
        Christoph Hellwig <hch@....de>, hpa@...or.com,
        linux-kernel@...r.kernel.org, mingo@...hat.com,
        Pavel Machek <pavel@....cz>, perex@...ex.cz,
        rientjes@...gle.com, tglx@...utronix.de, tiwai@...e.com,
        x86@...nel.org
Subject: Re: next-0519 on thinkpad x60: sound related? window manager crash

Excerpts from Takashi Iwai's message of June 11, 2020 1:11 pm:
> Thanks, so something still missing in the mmap handling, I guess.
> 
> I've worked on two different branches for potential fixes of your
> problems.  Could you test topic/dma-fix and topic/dma-fix2 branches?
>   git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
> Just pull one of them onto Linus' git HEAD.
> 
> I guess we'll go with David's new patch, but still it's interesting
> whether my changes do anything good actually.
> 
> 
> Takashi
> 

On torvalds 623f6dc593, topic/dma-fix causes sound to be output as 
alternating half-second bursts of noise and a few seconds of silence. 
topic/dma-fix2 appears to work properly.

Thanks,
Alex.