This issue we found in kernel 4.19.x, but Ubuntu 19.10 (kernel 5.4.x stable) iss ue not found. We are chromebook team, so for our product design it shouldn't be upgraded kernel to 5.4.x, however does it has any chance to fix issue in kernel 4.19.x?
-----Original Message----- From: Takashi Iwai tiwai@suse.de Sent: Wednesday, February 12, 2020 6:04 PM To: Kao. Lucien (TPE) Lucien_Kao@compal.com Cc: nathan.d.ciobanu@linux.intel.com; Cheng. AJ (TPE) AJ_Cheng@compal.com; int el-gfx@lists.freedesktop.org; alsa-devel@alsa-project.org; Wang. CindyXT (TPE) < CindyXT_Wang@compal.com>; Ye. Nelson (TPE) Nelson_Ye@compal.com; Yap. Shane (T PE) Shane_Yap@compal.com; Tseng. Evan (TPE) Evan_Tseng@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 Wed, 12 Feb 2020 10:37:30 +0100, Lucien_Kao@compal.com wrote:
Hi Takashi
Sorry to bother you again, during this period I do some experiment then issue
may be fixed by my local patch, but I am not sure, however may I have your sugge stion if you are available.
I put snd_hda_codec_read and snd_hda_codec_set_power_to_all ahead then add deb
ug log in function haswell_verify_D0 I found my changes cause cvt_nid and nid co uld get "power state: 1" every single time after re-plug type-c cable then playi ng music, you can see flash_once_fixed_messages in details. But without my patch which nid gets "power state: 0" and external type-c monitor flashes once after playing music. Assume my finding is right, do we have chance to submit code to f ix issue? Thanks.
Is the issue reproduced with the latest upstream code (or at least 5.4.y stable) ? Then yeah, we need to take a deeper look.
thanks,
Takashi
With patch 2020-02-12T00:58:27.496016-08:00 ERR kernel: [ 47.729823] @@@ cvt_nid power
state: 1
2020-02-12T00:58:27.496024-08:00 ERR kernel: [ 47.729883] @@@ nid power stat
e: 1
Without patch 2020-02-12T00:55:36.795016-08:00 ERR kernel: [ 125.047502] @@@ cvt_nid power state: 1 2020-02-12T00:55:36.795026-08:00 ERR kernel: [ 125.047565] @@@ nid power state: 0
-----Original Message----- From: Takashi Iwai tiwai@suse.de Sent: Wednesday, January 8, 2020 2:18 PM To: Kao. Lucien (TPE) Lucien_Kao@compal.com Cc: nathan.d.ciobanu@linux.intel.com; Cheng. AJ (TPE) AJ_Cheng@compal.com; intel-gfx@lists.freedesktop.org; alsa-devel@alsa-project.org; Wang. CindyXT (TPE) CindyXT_Wang@compal.com; Ye. Nelson (TPE) Nelson_Ye@compal.com; Yap. Shane (TPE) Shane_Yap@compal.com; Tseng. Evan (TPE) Evan_Tseng@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 Wed, 08 Jan 2020 04:07:17 +0100, Lucien_Kao@compal.com wrote:
Hi Takashi
Is the attachment what you suspect? That merged to our kernel v4.19 already,
have any suggestions? Thanks.
Then I have no concrete idea. It might be some other changes in HDMI codec dr
iver or it might be a fix in i915 graphics side, or even thunderbolt or whatever , too...
Takashi
-----Original Message----- From: Takashi Iwai tiwai@suse.de Sent: Wednesday, January 8, 2020 2:57 AM To: Nathan Ciobanu nathan.d.ciobanu@linux.intel.com Cc: Kao. Lucien (TPE) Lucien_Kao@compal.com; Cheng. AJ (TPE) AJ_Cheng@compal.com; intel-gfx@lists.freedesktop.org; alsa-devel@alsa-project.org; Wang. CindyXT (TPE) CindyXT_Wang@compal.com; Ye. Nelson (TPE) Nelson_Ye@compal.com; Yap. Shane (TPE) Shane_Yap@compal.com; Tseng. Evan (TPE) Evan_Tseng@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 Tue, 07 Jan 2020 18:24:57 +0100, Nathan Ciobanu wrote:
On Mon, Jan 06, 2020 at 08:08:04AM +0000, Lucien_Kao@compal.com wrote:
Hi Takashi
We verified on Ubuntu 19.10 with kernel 5.4.0.0-050400-generic (please r
efer 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. I t seems had some fix in latest kernel.
Takashi, can you point to the patch series you suspect may have fixed this
issue?
The first suspect would be 2756d9143aa517b97961e85412882b8ce31371a6 ALSA: hda - Fix intermittent CORB/RIRB stall on Intel chips
Takashi
Thanks, Nathan
Thanks.
-----Original Message----- From: Takashi Iwai tiwai@suse.de Sent: Friday, January 3, 2020 5:16 PM To: Cheng. AJ (TPE) AJ_Cheng@compal.com Cc: intel-gfx@lists.freedesktop.org; alsa-devel@alsa-project.org; nathan.d.ciobanu@linux.intel.com; Wang. CindyXT (TPE) CindyXT_Wang@compal.com; Ye. Nelson (TPE) Nelson_Ye@compal.com; Yap. Shane (TPE) Shane_Yap@compal.com; Kao. Lucien (TPE) Lucien_Kao@compal.com; Tseng. Evan (TPE) Evan_Tseng@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_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 o
nce 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 m
onitor.
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 ad
vice. 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 improve s the situation, so let's check the recent code.
thanks,
Takashi
AJ Cheng NID/NID1 e-mail: AJ_Cheng@compal.commailto:AJ_Cheng@compal.com Tel: +886-2-8797-8599 ext. 17561 Mobile : +886-932827829 COMPAL Electronics, Inc.
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