I tried to rootcause my flicker over the last few days, it was
definitely not due to the kernel and neither due to plymouth (tried by
installing the respective packages from focal in eon and vice versa in
focal). One thing I wanted to try next was initramfs but did not have
the time to test.
Today
Regarding the video showing the flicker: I missed to film the upper part
of the screen, so you don't get to see the cursor flashing up in the
upper left corner.
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@vanvugt Coming from the other bug report I'm trying to describe my
problem:
First of all I don't see purple as I have disabled the purple grub by running
chmod -x /etc/grub.d/05_debian_theme
Secondly: In Ubuntu 19.10 there is no flicker happening for me, while in
Ubuntu 20.04 there is a flicker
@vanvugt: Why is it then that it flickers in focal but does not flicker
in eoan for me?
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Title:
i915: Display flickers (monitor lose
** Description changed:
- This is a reintroduction of
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1808957 which I am
experiencing with Ubuntu 20.04 fully upgraded on a Dell XPS 13 9360. This did
not happen before in Ubuntu 19.04.
-
+ This is a reintroduction of
+ https://bugs.launch
apport information
** Attachment added: "PulseList.txt"
https://bugs.launchpad.net/bugs/1860390/+attachment/5321859/+files/PulseList.txt
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** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1860390/+attachment/5321861/+files/UdevDb.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Attachment removed: "AlsaDevices.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/
apport information
** Attachment added: "RfKill.txt"
https://bugs.launchpad.net/bugs/1860390/+attachment/5321860/+files/RfKill.txt
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** Attachment added: "ProcModules.txt"
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** Attachment added: "ProcInterrupts.txt"
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** Attachment added: "ProcEnviron.txt"
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** Attachment added: "CRDA.txt"
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Ti
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** Attachment added: "Lsusb-v.txt"
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** Attachment added: "Card0.Codecs.codec.0.txt"
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** Attachment added: "Card0.Codecs.codec.2.txt"
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** Attachment added: "AplayDevices.txt"
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** Attachment added: "ProcCpuinfoMinimal.txt"
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** Attachment added: "Lspci.txt"
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** Attachment added: "PciMultimedia.txt"
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** Attachment added: "CurrentDmesg.txt"
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** Tags added: apport-collected
** Description changed:
This is a reintroduction of
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1808957 which I am
experiencing with Ubuntu 20.04 fully upgraded on a Dell XPS 13 9360. This did
not happen before in Ubuntu 19.04.
apport information
** Attachment added: "Card0.Amixer.values.txt"
https://bugs.launchpad.net/bugs/1860390/+attachment/5321848/+files/Card0.Amixer.values.txt
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Affects me too on a Dell XPS 13 9360, I opened a new bug here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1860390
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https://bugs.launchpad.net/bugs/1808957
Title
Public bug reported:
This is a reintroduction of
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1808957 which I am
experiencing with Ubuntu 20.04 fully upgraded on a Dell XPS 13 9360. This did
not happen before in Ubuntu 19.04.
It seems that the Dell 9360 is set to go into s2idle mode
@vanvugt: Also tested Focal on the XPS 13 9360 now, it's flickering
there. So the issue is fixed in Eoan but not in Focal. Could you push
the fix to Focal too?
** Tags removed: eoan
** Tags added: focal
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@vanvugt No flickering for me on an XPS 13 9360 apart from the
brightness getting adjusted at the same time the spinner starts. When
the brightness is set to maximum before rebooting I don't notice
anything apart from the spinner appearing. In a perfect world the
brightness would be adjusted gradua
Indeed, I forgot to upgrade so I missed the issue. Now that I did I see
the hiss is indeed much louder. Thanks Kai for sending this upstream
already.
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I've had this issue since 2017 all the time. As you can see in the
comments, Kai suggested that this is an hardware issue. He developed a
workaround for the kernel that I tested, however it made the general
output volume significantly lower, see #96, which is the reason this fix
was never shipped.
Got my touchpad replaced in November, I have never seen this issue
again, Dell support on twitter is amazing btw.
** Changed in: dell-sputnik
Status: Confirmed => Invalid
** Changed in: linux (Ubuntu)
Status: Confirmed => Invalid
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The thing that makes this bug so annoying for me is that sometimes I do
not experience it for weeks and suddenly it appears and does not stop
but in the end stops again as unexpected as it started. This bug is
clearly non deterministic.
I even managed to find a way to reproduce it, but only under
For the output volume I made the following observations:
* Even with a volume boost of 150% in Pulseaudio (the maximum), the output
volume is still significantly lower than the unpatched kernel
* With 150% pulseaudio boost, I can hear disortions and crackling, so the sound
quality gets significan
Kai, I compile my own kernels and I would like to use this right now,
could you please link me the patch? The test kernel floods my syslog
badly with touchpad debug entries (unrelated to this bug).
Now regarding testing: By software boost you mean we should test both:
Microphone software boost and
Kai: I do not understand your last comment, could you elaborate? Did you
mean we should test if software boost = pulseaudio boost performs well
enough?
Kai, I am quite happy with
http://people.canonical.com/~khfeng/lp1654448-2/ please link me the
patch as the only drawback would be the lower volum
Could you please post the patch for
http://people.canonical.com/~khfeng/lp1654448-2/ ?
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Title:
XPS 13 9360 and 9350, Realtek ALC3246
Kai, http://people.canonical.com/~khfeng/lp1654448-2/ does not have the
hiss :-).
Would compensating the lower output volume with setting pulseaudio to
100+% make the quality worse? Does setting pulseaudio to e.g. 130%
disort the quality?
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Kai, Thank you very much for looking into this and answering questions. Kudos!
I think the behavior should remain as it is if the output volume is reduced
that much AND support for microphone devices is crippled.
My arguments: It is still better to hear the hiss when music is at low volume
than h
Yeah but I don't think it gets through to the right people. If I read most of
the forums discussions no one acknowledges the problem. Only suggestions are to
install the latest drivers.
The 9360 came out one year after the 9350 and still has the same issue. User's
experiences are not that grave
Kai: I understand what you are saying ... but I would find it great if
you could point that out to Dell ... just because now it is bad, does
not mean it can't be improved in the future. With proper hardware
testing this could have been avoided.
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Kai: Yeah but it would be nevertheless good to communicate that to the right
people of Dell.
Is this an integrated component I can't exchange? Is it Intel integrated Audio
or is it an external chip?
Hence I would like to do something on hardware level ... is this not
possible?
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Kai: So you are saying the sound card is buggy on a hardware level? Does
this only affect XPS13's or are other Laptops possibly affected too? I
guess all that are using the same soundcard?
How about communicating this to Dell? Or isn't this their fault? Is the
vendor of the sound card to fault? Or
Kai: Confirmed my assumption, your patch SIGNIFICANTLY lowers the output
volume!
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Title:
XPS 13 9360 and 9350, Realtek ALC3246, Head
load-module module-echo-cancel aec_method=webrtc sink_name=cancel.out
source_name=cancel.src
set-default-source cancel.src
set-default-sink cancel.out
does not change anything either. To make the hiss disappear I have to
mute the hardware output device.
Would be glad if someone could point out h
Regarding the second question: The workaround "amixer -c 0 set
'Headphone Mic Boost',0 1" does lower the output volume significantly.
If your patch does the same as the workaround, then the output volume
would be significantly lower, I have not tested this yet though.
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Another question: You say your code does the same as the workaround
"amixer -c 0 set 'Headphone Mic Boost',0 1" ... so the output volume is
decreased too with your patch?
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htt
load-module module-echo-cancel aec_method=webrtc source_name=cancel
set-default-source cancel
does not improve the situation. The hiss remains unchanged for me.
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Thanks very much for the code!! Out of interest, how would you achieve
the noise cancellation with pulseaudio?
I tried
load-module module-echo-cancel source_name=test
set-default-source test
which did not work.
A new device appears called "Built-in Audio Analog Stereo (echo
cancelled with Built
When you connect the jack you can choose between 3 options normally
(with the kernel in [1] only two now)... isn't it somehow possible to
operate with microphone disabled by default ... but leave the user the
option to use a traditional mircophone? The white noise should then only
be triggered when
Yes that solves the issue :-). Could you link me the code changes?
But are you sure you can't fix the support for traditional microphones? :-(
Would be a sad loss, could you elaborate why this is not possible?
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Yes it disappears! (forgot to run alsamixer as root).
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Title:
XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss
Status in
amixer -c 0 set 'Headphone Mic Boost',0 1 does not work, it says
"Headphone Mic Boost" not found, so yes, I am however not familiar with
alsamixer. Where would I find "Headphone Mic Boost"?
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This time there are no KHFENG entries in dmesg.
** Attachment added: "new.txt"
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1654448/+attachment/4900217/+files/new.txt
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Same situation :-(. The hiss is cleary audible, no change.
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Title:
XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss
Stat
** Attachment added: "dmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1654448/+attachment/4900166/+files/dmesg.txt
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Unfortunately the hiss is still there :-(.
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Title:
XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss
Status in Dell Sputn
Is it already the new one as of now? I have just tried it and it did not
help :-(.
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Title:
XPS 13 9360 and 9350, Realtek ALC3246, He
I confirm Daniel van Vugt, same for me.
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Title:
XPS 13 9360 and 9350, Realtek ALC3246, Headphone audio hiss
Status in Dell Sputnik:
Kai-Heng Feng: Is there anybody still working in this? Are you sure Kailiang
noticed this bug?
Is there anything else I could do for you to help?
** Changed in: dell-sputnik
Status: New => Confirmed
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I tried blacklisting the snd_hda_codec_realtek module, sound works, but
now I can hear the coil whine, depending on the activity of the cpu/gpu.
Moving the mouse pointer around is clearly audible etc.
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@vanvugt: I can clearly reproduce the problem with headphones too, I do
not notice they "hide" anything.
I noticed the hiss listening to music so I can always clearly hear it
and it becomes very apparent in a quiet environment.
On another note, with the workaround in place the audio is way to qui
Confirming Daniel van Vugt: The kernel
http://people.canonical.com/~khfeng/lp1654448/ does not improve the
situation.
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Title:
XPS 13
@vanvugt: The earphones I tested (Bose Soundtrue Ultra) are Android
ones. I have also tested headphones with no microphone (Sennheiser
HD202).
@kaihengfeng: I will install Ubuntu from scratch in order to test your
kernelsl
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Regarding the Bose Quiet Comfort ... those are noise cancelling headphones, it
is no surprise to me that those cancel the hiss.
I have tested multiple normal earphones and I can reproduce the issue everytime.
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@spike speigel: The tlp issue in the arch Linux wiki is unrelated. The point I
was that when tlp is installed and no audio is currently playing, tlp turns off
the sound card and thus the hiss disappears.
The second point I was trying to say: Of course the white noise is audible when
nothing is
Addendum to the original description:
Steps to reproduce:
0. Make sure tlp is NOT installed
1. Plug in headphones
2. Make sure volume is not muted!
NOTES:
Ad 0.: tlp configures audio power saving, the hiss is only noticeable when
listening to music.
Ad 2.: If the headphones are muted then there
Kai, I have tested the 4.12 mainline kernel. The hiss is clearly audible.
Please make suggestions how I can help you.
My earphones are Bose Soundtrue Ultra, but I guess that wont be helpful
to know.
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sbeattie: Any chance of building bash with pie in the future? 16.10 has
4.8 as default kernel, so disabling pie should not be necessary
anymore!?
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