Re: Intel HDA audio on EEE PC 1101HGo

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Sometimes it's my impression the beep is not emitted. but I may be wrong. If I determine it, I'll report back.
But the system is stable so far, and I can't find other messages in the dmesg.


Enrico

On Tue, 10 Jan 2017, Takashi Iwai wrote:

Date: Tue, 10 Jan 2017 11:52:22
From: Takashi Iwai <tiwai@xxxxxxx>
To: Enrico Mioso <mrkiko.rs@xxxxxxxxx>
Cc: hui.wang@xxxxxxxxxxxxx, alsa-devel@xxxxxxxxxxxxxxxx, kailang@xxxxxxxxxxx
Subject: Re:  Intel HDA audio on EEE PC 1101HGo

On Tue, 03 Jan 2017 14:49:40 +0100,
Enrico Mioso wrote:

hello Tahaski,
hello everyone reading this message.

Thank you for the patience you had with me. Now I finally came to set up this system for crash analysis, compiling the kernel with debug informations and frame pointers and so on. I set up kdump also. Unfortunately, I can get no useful output.
The last things the system wrote before dying have been reconstructed. I noted down decimal values with the help of my mum. She wrote them down on a piece of paper.
I am hitting the following messages:
azx_get_response timeout, switching to polling mode: last cmd=0x014ba000
azx_get_response timeout, switching to single_cmd mode: last cmd=0x014ba000

It's reading the output amp on NID 0x14, the speaker pin.  It's weird
that such a verb triggers the problem.  Usually the unexpected
behavior is triggered at the widget power up/down.

If the switching to single cmd mode causes an issue, you can disable
by the patch like below.  This may lead to the continuous errors,
though.


Takashi

---
diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
index 500878556578..43bf151d8712 100644
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -861,6 +861,7 @@ static int azx_rirb_get_response(struct hdac_bus *bus, unsigned int addr,
		return -EIO;
	}

+#if 0
	/* a fatal communication error; need either to reset or to fallback
	 * to the single_cmd mode
	 */
@@ -875,6 +876,7 @@ static int azx_rirb_get_response(struct hdac_bus *bus, unsigned int addr,
	chip->single_cmd = 1;
	hbus->response_reset = 0;
	snd_hdac_bus_stop_cmd_io(bus);
+#endif
	return -EIO;
}


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