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From: Takashi Iwai <tiwai@suse.de>
To: <AJ_Cheng@compal.com>
Cc: alsa-devel@alsa-project.org, CindyXT_Wang@compal.com,
	intel-gfx@lists.freedesktop.org, Nelson_Ye@compal.com,
	Shane_Yap@compal.com, Lucien_Kao@compal.com,
	Evan_Tseng@compal.com
Subject: Re: [Intel-gfx] [alsa-devel] USB Type-C monitor flashes once when play a video file after unplug and re-plug the monitor
Date: Fri, 03 Jan 2020 10:16:09 +0100	[thread overview]
Message-ID: <s5hwoa8j3xi.wl-tiwai@suse.de> (raw)
In-Reply-To: <d7aba6970fbd48f2b32e2bc6d838ab20@TPEMBX01.compal.com>

On Fri, 03 Jan 2020 02:57:03 +0100,
<AJ_Cheng@compal.com> wrote:
> 
> Hi Sirs,
>         Here is chromebook SW team from Compal.
> As the mail title, we hit issue that the external monitor will flash once when play video after hot pluging.
> We can reproduce not only on chromebook but also ubuntu 16.04.
> There has higher failure rate with Dell Solomon dock and Dell S2718D monitor.
> 
> We found adding the delay in "sound/pci/hda/patch_hdmi.c " can fix this issue.(as the attachment)
> May need your help to review and advice. Thanks.
> 
> Here is the issue number in gitlab for more detail.
> https://gitlab.freedesktop.org/drm/intel/issues/318

Could you check whether it still happens with the latest upstream
kernel, at least 5.4.y, if it wasn't tested yet?

I don't want to put a long delay just because of random reason unless
it's really mandatory.  I'm wondering whether the recent write-sync
change improves the situation, so let's check the recent code.


thanks,

Takashi

> 
> 
> 
> AJ Cheng
> NID/NID1
> e-mail: AJ_Cheng@compal.com<mailto:AJ_Cheng@compal.com>
> Tel:  +886-2-8797-8599 ext. 17561
> Mobile : +886-932827829
> COMPAL Electronics, Inc.
> 
> [2 flash_once.diff <application/octet-stream (base64)>]
> 
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
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  reply	other threads:[~2020-01-03  9:16 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-03  1:57 [Intel-gfx] USB Type-C monitor flashes once when play a video file after unplug and re-plug the monitor AJ_Cheng
2020-01-03  9:16 ` Takashi Iwai [this message]
2020-01-06  8:08   ` [Intel-gfx] [alsa-devel] " Lucien_Kao
2020-01-07 17:24     ` Nathan Ciobanu
2020-01-07 18:57       ` Takashi Iwai
2020-01-08  3:07         ` Lucien_Kao
2020-01-08  6:17           ` Takashi Iwai
2020-02-12  9:37             ` Lucien_Kao
2020-02-12 10:03               ` Takashi Iwai

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