Sorry!! Forgot attach file. > -----Original Message----- > From: Kailang > Sent: Friday, July 5, 2019 10:41 AM > To: 'He, Bo' <bo.he@xxxxxxxxx>; alsa-devel@xxxxxxxxxxxxxxxx; > linux-kernel@xxxxxxxxxxxxxxx > Cc: perex@xxxxxxxx; tiwai@xxxxxxxx; jian-hong@xxxxxxxxxxxx; > drake@xxxxxxxxxxxx; chiu@xxxxxxxxxxxx; hui.wang@xxxxxxxxxxxxx > Subject: RE: audio lost from speaker after reboot from windows on the device > ALC295 > > Hi Bo He, > > Could you help to dump info for us? > Please use attach file to get results. > > ./alsa-info.sh --no-upload > > You will find dump file in folder /tmp/alsa-info.txt-????????. > > Please run one time in normal state and one time in fail state. > Please send two result files to me. > > BR, > Kailang > > > -----Original Message----- > > From: He, Bo <bo.he@xxxxxxxxx> > > Sent: Thursday, July 4, 2019 8:02 PM > > To: Kailang <kailang@xxxxxxxxxxx>; alsa-devel@xxxxxxxxxxxxxxxx; > > linux-kernel@xxxxxxxxxxxxxxx > > Cc: perex@xxxxxxxx; tiwai@xxxxxxxx; jian-hong@xxxxxxxxxxxx; > > drake@xxxxxxxxxxxx; chiu@xxxxxxxxxxxx; hui.wang@xxxxxxxxxxxxx > > Subject: audio lost from speaker after reboot from windows on the > > device > > ALC295 > > > > Hi, patch_realtek.c maintainer: > > I see one issue that reboot from windows and boot to ubuntu, the > > audio lost from speaker, I suspect there are some bugs in > > patch_realtek.c drivers, the device is ALC295 and the device id is > 0x10ec0295. > > > > I have done the below experiments: > > 1. reboot from windows to windows, the audio is persist . > > 2. reboot from windows to ubuntu, the audio lost from speaker, but can > > hear if I hotplug one earphone. > > 3. if the issue reproduce after reboot from windows, reboot the ubuntu > > can't restore the audio, I suspect it's warm reset. > > 4. if I write the port 0xcf9 with 0xe to do cold reset, the audio can restore. > > 5. if I do suspend/resume, the audio can restore, I suspect do cold > > boot and suspend will trigger the platform reset to reset the ALC295. > > 6. if I do double function reset (write the verb 0x7ff in alc_init), > > the audio is still can't restore. > > snd_hda_codec_write(codec, 0x01, 0, AC_VERB_SET_CODEC_RESET, 0); /* > > Function reset */ snd_hda_codec_write(codec, 0x01, 0, > > AC_VERB_SET_CODEC_RESET, 0); /* double Function reset */ 7. the issue > > is first found on kernel 4.19.50, I still see the issue with the > > latest kernel 5.2-rc2, is it possible windows change some default > > registers, but ALC295 don't initialize the register? > > > > ------Please consider the environment before printing this e-mail.
Attachment:
alsa-info.sh
Description: alsa-info.sh
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