Discussed in HWE sprint, Hui will do some testing on Lenovo machines
from Beijing office to check if the parameter is necessary.
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Titl
Waiting for some power measures to figure out if power_save_controller=N
has any practical difference or not
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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** Changed in: hwe-next
Importance: Undecided => High
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Title:
[Dell Vostro 5470] No HDMI audio with 14.04
Status in HWE Next Pro
Hi Po-Hsu,
Unfortunately testing with a wattage meter on AC power will not work.
The power saving is disabled when on AC power anyhow, it is only enabled
when on battery power (and that's why we have the bug only when on
battery power too).
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Hello David,
I'm not sure to what extent this tweak will affect the battery life.
I tried to measure the power consumption today, with and without these two
options individually.
But I can't tell the real difference between them, the reading will jump within
a certain range.
Maybe the euipement
Hi Po-Hsu,
So Timo tested and confirmed the bug too. And also that using
options snd-hda-intel power_save_controller=N
...in /etc/modprobe.d/alsa-base.conf also fixes the issue, and is less
invasive than jackpoll_ms=500. The question is if using the above
power_save_controller change causes wors
** Tags removed: blocks-hwcert taipie-lab
** Tags added: 201305-13624 201306-13869 201402-14675 taipei-lab
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Title:
[Dell Vostro 5470
** Changed in: linux (Ubuntu)
Importance: Medium => High
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Title:
[Dell Vostro 5470] No HDMI audio with 14.04
Status in HWE Next
I would say let's ignore comment #6, I can't reproduce it anymore, sorry
for the confusion.
I tried to install 14.04.1 + 3.13.0-37 kernel to reproduce it, but the
speaker audio output changed to "Dummy Output", which is totally
different from the environment in the beginning of this report.
There
So in comment #9 you say that "jackpoll_ms = 500" will make detection work,
and in comment #6 you say that "jackpoll_ms = 500" will not make detection work
- could you clarify?
Is there a specific case where "jackpoll_ms = 500" does not help?
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To make it more clear,
I re-install 14.04.1 more than three times on this system in the past few days,
it seems that when it's unplugged, the HDMI audio hot-plug detection will fail.
But it work well with adapter plugged.
And adding the "jackpoll_ms = 500" entry, could make it work without
adapter
> Warning: rate is not accurate (requested = 11025Hz, got = 32000Hz)
please, try the plug plugin
This is nothing to worry about. The hardware does not support 11025Hz,
and the string "-D hdmi:HDMI,1" does not allow alsa to insert any sample
rate converter.
> And after adding the new entry to /etc
BTW, with the command:
aplay -D hdmi:HDMI,1 Media-Convert_test3_PCM_Stereo_VBR_16SS_11025Hz.wav
The rate will be incorrect,
Playing WAVE 'Media-Convert_test3_PCM_Stereo_VBR_16SS_11025Hz.wav' : Signed 16
bit Little Endian, Rate 11025 Hz, Stereo
Warning: rate is not accurate (requested = 11025Hz,
Hello David,
With "aplay -D hdmi:HDMI,1 tmp.wav" command, I can play a wav file through the
speaker of a HDMI monitor
But adding:
"options snd-hda-intel jackpoll_ms=500"
Can't make the detection work properly.
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Ok, so to start from the bottom:
The aplay or speaker-test device you'd like to test with is likely
"hdmi:HDMI,1", i e
aplay -D hdmi:HDMI,1 tmp.wav
Second, I wonder if this is something we've brought upon us during the
upgrades and trying to get all the power savings right.
Can you try editing
** Changed in: linux (Ubuntu)
Assignee: Anthony Wong (anthonywong) => David Henningsson (diwic)
** Changed in: hwe-next
Status: New => Triaged
** Changed in: hwe-next
Assignee: (unassigned) => David Henningsson (diwic)
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** Tags added: bios-outdated-a09 regression-release
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Title:
[Dell Vostro 5470] No HDMI audio with 14.04
Status in HWE Next Project:
Further debugging information:
After the HDMI cable was disconnected, if the HDMI audio output option is still
there, you could try to use "Test Sound" on it, it will disappear right away.
And if it's not detected with hot plug, the following command could make it
available:
(although nothing co
I would say it's quite unstable, and I was informed that this could be a
kernel race issue.
After I installed the 3.12 kernel on this system and cold boot into
3.13.0-37 (I forgot to switch to 3.12 on boot) with HDMI cable connected
HDMI audio is now available.
But if you disconnect it, sometimes
** Also affects: hwe-next
Importance: Undecided
Status: New
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Title:
[Dell Vostro 5470] No HDMI audio with 14.04
Status in
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