On Mon, Jan 06, 2020 at 08:08:04AM +0000, lucien_...@compal.com wrote: > Hi Takashi > > We verified on Ubuntu 19.10 with kernel 5.4.0.0-050400-generic (please refer > to attachment), the result is positive which symptom doesn't happen anymore > once I played music or video sound output through Dell S2718D Type-C monitor. > It seems had some fix in latest kernel.
Takashi, can you point to the patch series you suspect may have fixed this issue? Thanks, Nathan > > Thanks. > > > -----Original Message----- > From: Takashi Iwai <ti...@suse.de> > Sent: Friday, January 3, 2020 5:16 PM > To: Cheng. AJ (TPE) <aj_ch...@compal.com> > Cc: intel-gfx@lists.freedesktop.org; alsa-de...@alsa-project.org; > nathan.d.ciob...@linux.intel.com; Wang. CindyXT (TPE) > <cindyxt_w...@compal.com>; Ye. Nelson (TPE) <nelson...@compal.com>; Yap. > Shane (TPE) <shane_...@compal.com>; Kao. Lucien (TPE) > <lucien_...@compal.com>; Tseng. Evan (TPE) <evan_ts...@compal.com> > Subject: Re: [alsa-devel] USB Type-C monitor flashes once when play a video > file after unplug and re-plug the monitor > > On Fri, 03 Jan 2020 02:57:03 +0100, > <aj_ch...@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_ch...@compal.com<mailto:aj_ch...@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-de...@alsa-project.org > > https://mailman.alsa-project.org/mailman/listinfo/alsa-devel _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx