Same problem a year later on
Linux 5.15.0-52-generic #58~20.04.1-Ubuntu SMP Thu Oct 13 13:09:46 UTC 2022
x86_64 x86_64 x86_64 GNU/Linux, Intel NUC 15 laptop. :\
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Same problem here with a Dell XPS 9130 runnting Ubuntu 20.04.3. My
laptop only has a Intel Iris graphics card.
As for others, changing the frequency from 60Hz to 30Hz "solved" the
problem.
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I have the same problem on my laptop
Asus GL552VW, with i5-6300HQ
GTX 960M, with NVIDIA driver 470.57
Ubuntu 21.04
My second HDMI monitor has blink screen every 30~60 seconds, and #136's
solution works for me
I changed the refresh rate of screen from 60Hz(default) to 74.91Hz
After that, blink
I am seeing the same problem on a Dell Precision 7750.
Ubuntu 20.04LTS
kernel: 5.11.0-27-generic #29~20.04.1-Ubuntu SMP
graphics: VGA compatible controller: NVIDIA Corporation TU106GLM [Quadro RTX
3000 Mobile / Max-Q] (rev a1)
plus Intel i915
processor: Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz
Hi there Frederic.
I think that's a different bug, probably a Nvidia problem. I reported here a
problem where depends of Intel.
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I'm just facing this same issue since today after upgrading 20.04 kernel
from 5.8.x to 5.12.6-051206-generic.
Second screen is detected by Nvidia, but black. When I change down the
resolution from 1920x1080 to 1280x1024 the 2nd screen reappear. Then if
I put back 1920x1080, the screen keeps alive
Hi Akash.
Yeah, that's right. Definitely you have the same problem described here.
Do you have an Asus too? Laptop?
Atm the only thing you can do is run 4.15 ver. Some monitors on 30Hz
works too (don't know why).
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Hi all.
I am also affected by this bug. Just to be clear, Ubuntu 20.04 works
with a previous version of Linux Kernel right ( <= 4.15)? I can use a
downgraded version of the kernel for now if thats the only thing that
can be done atm.
Regards,
Akash
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Hi there.
Months ago I tried this branch:
https://github.com/vsyrjala/linux/tree/skl_vswing_wa_hacks
But the second monitor doesn't work. There's a discussion on
https://gitlab.freedesktop.org/drm/intel/-/issues/2181
And no, at the moment there's no a solution. I just found a little fact
so
Noctis, have you tried the branch?
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Ubuntu 20.04?
Any update on how to fix this bug?
I am having the same problem when trying to connect a second monitor to
the second GPU (Nvidia GTX 1080). Only an X cursor can be displayed and
the rest is a black screen. Nvidia X Server Settings detects 2 screens.
Ubuntu 20.04 LTS Screen Display detects only 1
I think I may be having a related issue.
Lenovo P1 Gen 2
Ubuntu 20.04
I am trying to connect 2 external monitors both connected via USB-C
All was well for the first 2 hours. Then I unplugged my laptop worked
off of battery for about an hour. Tried to plug back into the monitors
and thats when
I read the emails. Thank you so much for your help Kai-Heng, you even
told them the issue was opened two months ago on freedesktop's gitlab.
I'll try the hacks later and I'll be posting about this discussion
there.
Let's see if this works.
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Please try the branch:
https://github.com/vsyrjala/linux/tree/skl_vswing_wa_hacks
And let's continue our discussion to:
https://gitlab.freedesktop.org/drm/intel/-/issues/2181
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Oh, okey. Thanks Kai-Heng. I'll be attentive.
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Noctis, not yet.
I just pinged the upstream devs.
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
I started to have same problem when upgraded today to Ubuntu 20.04 LTS on my
docking station with VGA port.
HP EliteBook 930p laptop
Samsung SyncMaster 2043"
Port: VGA
"lspci" output: 00:02.1 Display controller: Intel Corporation Mobile 4
Series Chipset Integrated Graphics Controller (rev 07)
Hi there.
We know something Kai-Heng?
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Ubuntu
And the i915_vbt file.
** Attachment added: "i915_vbt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1871721/+attachment/5407047/+files/i915_vbt
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The second ( intel_reg read 0x64000 0x64100 0x64200 0x64300 0x64400
0x6C00C )
** Attachment added: "withoutparameters2.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1871721/+attachment/5407046/+files/withoutparameters2.txt
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The first command (intel_reg read --count 20 0x64E00 0x64E60 0x64EC0
0x64F20 0x64F80)
** Attachment added: "withoutparameters1.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1871721/+attachment/5407045/+files/withoutparameters1.txt
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1) Please remove "blacklist=i915,snd_hda_intel
modprobe.blacklist=i915,snd_hda_intel 3" and run commands in comment
#117 again.
2) Attach "/sys/kernel/debug/dri/0/i915_vbt" here.
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"Looks like it's using the 400mV/0dB setting. Can we get the same dumps
with the driver loaded just to confirm whether we're using different
settings? "
What does that means? The 400mV/0dB setting. And how can I know/proceed
if I get the same dumps with the driver loaded? After introduce thoses
Noctis, new request from intel devs::
https://lore.kernel.org/intel-gfx/20200826130511.gn6...@intel.com/
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Title:
Second Monitor on
** Attachment added: "intel_reg read 0x64000 0x64100 0x64200 0x64300 0x64400
0x6C00C"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1871721/+attachment/5404549/+files/second-command.txt
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Okey, I did it. Tested with the last kernel (5.8.3).
Here are the results.
** Attachment added: "intel_reg read --count 20 0x64E00 0x64E60 0x64EC0 0x64F20
0x64F80"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1871721/+attachment/5404548/+files/first-comand.txt
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Oh, okey, I'll do it later.
I presume I have to do it with the actual kernel of 20.04? (5.4.0) Or
with the last kernel or...?
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Noctis Bennington,
Please install "intel-gpu-tools", then boot with kernel parameter
"blacklist=i915,snd_hda_intel modprobe.blacklist=i915,snd_hda_intel 3".
You might need to switch to other tty to see the login prompt.
Then read the register via the following command:
intel_reg read --count 20
Hi Santiago,
I read a lot of reports about that model, for sure it's a bug. Where I
read it, the HDMI doesn't work but some people made it works with some
"workarounds". In my case, thoses aren't the same problem as I have.
Maybe you wanna search about it on Launchpad.
If you have the problems I
Hi! ~kaihengfeng, I'm having the same issue (HDMI not working) after
upgrading from Ubuntu 18.04 to 20.04 using a Dell ThinkPad. Do you think
it's possible that the regression affects this model as well? Thanks!
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Tried that "workaround". Still without working as it should the second
monitor. :( I guess I have to wait until the bug fix comes...
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I just want to add that I have the same problem on my Asus N552VW. I
have managed to make it work from day 1, so hopefully this can help
someone until the proper bug fix is provided.
I have a laptop and an external monitor plugged via HDMI, everything is
turned off. Simply turn on the laptop and
https://lore.kernel.org/intel-gfx/844BC1FA-9C2F-4AAF-
a0d9-b9a1ea40f...@canonical.com/T/#u
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Title:
Second Monitor on HDMI blank
Oh, bingo. So finally we have the first bad commit. Thank you so much
for your help Kai-Heng.
How we proceed with this?
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Title:
0519c102f5285476d7868a387bdb6c58385e4074 is the first bad commit
commit 0519c102f5285476d7868a387bdb6c58385e4074
Author: Ville Syrjälä
Date: Mon Jan 22 19:41:31 2018 +0200
drm/i915: Implement display w/a #1143
Apparently SKL/KBL/CFL need some manual help to get the
programmed
With this one, the second monitor is working.
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
https://people.canonical.com/~khfeng/lp1871721/10
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
With this one, the second monitor doesn't work neither.
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia +
https://people.canonical.com/~khfeng/lp1871721/9
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
This one doesn't work the second monitor.
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Ubuntu
https://people.canonical.com/~khfeng/lp1871721/8
The suffix number doesn't always get bumped.
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Title:
Second Monitor on HDMI blank
Tested, aaand the second monitor is working now.
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
(I'll proceed to test anyway)
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Ubuntu 20.04? (ASUS
Isn't the same this one?
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Ubuntu 20.04? (ASUS
https://people.canonical.com/~khfeng/lp1871721/7
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
With this one doesn't work my second monitor.
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
https://people.canonical.com/~khfeng/lp1871721/6/
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Oh, from this one the second monitor doesn't work. We're close.
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Title:
Second Monitor on HDMI blank screen/blink screen with
https://people.canonical.com/~khfeng/lp1871721/5/
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
With that kernel the second monitor works.
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Ubuntu
https://people.canonical.com/~khfeng/lp1871721/4/
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Done, and...still without working.
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Ubuntu 20.04?
https://people.canonical.com/~khfeng/lp1871721/3/
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Oh, okey, but that's... a not-so-little work for you too. Sorry Kai-Heng
and thanks again.
Tested and it doesn't work neither.
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https://people.canonical.com/~khfeng/lp1871721/2/
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
No, nothing's wrong here.
We are doing a binary search to find the regression point. 9 more times to try.
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Title:
Second Monitor on
Tested, nd...the second monitor doesn't work. We did something wrong
here?
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Title:
Second Monitor on HDMI blank screen/blink
Alright, please try this kernel:
https://people.canonical.com/~khfeng/lp1871721/1/
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Title:
Second Monitor on HDMI blank
Okey, I reduce the search and the second monitor stop working since
4.17-rc1 (I tested rc2 and rc4 and nothing), only it works since 4.16.
I did "make localmodconfig" and all good (when it asks, I just press
"n").
Now, when I set "make -j`nproc` deb-pkg" I have this result:
Update: I didn't activate source code. I did it. I'll post with new
info.
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Title:
Second Monitor on HDMI blank screen/blink screen
When I try that, it says something like: "E: Could not find package for
linux". Why's that?
And okey, I'll try with the -rc*.
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"sudo apt build-dep linux"
And please try the -rc* kernels to minimize bisect range.
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Title:
Second Monitor on HDMI blank
Oh, sorry I didn't see that.
I did this:
noctis@noctis-pcgaming:~/linux$ git bisect good v4.16
noctis@noctis-pcgaming:~/linux$ git bisect bad v4.17
Biseccionando: faltan 7380 revisiones por probar después de esto
(aproximadamente 13 pasos)
[97b1255cb27c551d7c3c5c496d787da40772da99]
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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Title:
Second Monitor on HDMI blank screen/blink screen with
Update: Sorry Kai-Heng, but the two lines:
"sudo apt build-dep linux"
&&
"git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/"
gives me an error.
The first told me it doesn't find the package and the second told me this:
"fatal: error remoto: access denied or repository not
Okey, let's go then. Before of this, thank you so much for your help
Kai-Heng.
First update:
Kernel 4.16.18. Second monitor works perfectly.
Kernel 4.17.0. Second monitor starts again with the problem.
Whatever it is, this happened between 4.16.xx and 4.17.x.
Now I'll do the steps you
Thanks a lot. Please do a kernel bisection then...
First, find the last -rc kernel works and the first -rc kernel doesn’t work
from http://kernel.ubuntu.com/~kernel-ppa/mainline/
Then,
$ sudo apt build-dep linux
$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
$ cd
Seeing I can't make work the second monitor I installed on 20.04 the
4.15 kernel. Now it works, so this is for sure something about the
kernel. On 4.15 and higher, the second monitor doesn't work.
Tested on 5.8. And it doesn't work neither.
** Bug watch added:
"On 4.15 and higher, the second monitor doesn't work."
Sorry, *HIGHER THAN 4.15, NOT 4.15*, with 4.15 this works as it should
be.
** Description changed:
I installed Ubuntu 20.04 on my ASUS laptop with Intel+Nvidia with propietary
drivers of Nvidia (I have 440.64 rn) and I connected a second
PD: There's the link to see this bug posted on freedesktop.org:
https://gitlab.freedesktop.org/drm/intel/-/issues/2181#note_580910
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Ubuntu 20.04 with Nvidia drivers 450.xx. Doesn't work for me.
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia
This helped me: https://linuxconfig.org/how-to-install-the-nvidia-
drivers-on-ubuntu-20-04-focal-fossa-linux
sudo add-apt-repository ppa:graphics-drivers/ppa
ubuntu-drivers devices
sudo apt install nvidia-driver-450
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I found something (I think). Depends of what kind of Hz I set it, it
blinks more or less (less Hz setted less blinks it).
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I did it, aand nothing works unfortunately :\
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Ok, there are four refreshes for 1920x1080:
1920x1080 60.00*+ 59.97 59.96 59.93
What if different one get picked?
** No longer affects: nouveau-firmware (Ubuntu)
** No longer affects: mesa (Ubuntu)
** No longer affects: nvidia-graphics-drivers-440 (Ubuntu)
** Package changed:
I think it means 59,94Hz, which's available on Linux too.
And okey, I'll do it, thank you Kai-Heng!
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Title:
Hmm, there's no 59Hz under linux.
Please file an upstream bug at intel graphics upstream:
https://gitlab.freedesktop.org/drm/intel/wikis/How-to-file-i915-bugs
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Just to let you know, if I adjust the resolution to 800x600 it works,
but "blinks" every 10-15 seconds. It's so strange.
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On W10 it's setted as 1920x1080 - 59Hz. It works perfectly.
I tried with this resolution on Ubuntu 20.04. Still doesn't works.
** Attachment added: "Resolution and refresh second monitor on W10.PNG"
What's the resolution and refresh rate picked under Windows?
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Title:
Second Monitor on HDMI blank
Done. Here's the file.
PD: I was thinking the same when I read the "LSPCON" Intel's
funcionality
** Attachment added: "dmesg"
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-440/+bug/1871721/+attachment/5391375/+files/dmesg
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Please test latest drm-tip kernel with kernel parameter "drm.debug=0xe
log_buf_len=16M":
https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/
...and attach dmesg here...
Hopefully this is not another LSPCON bug...
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I tried with Wayland but only with Intel (there's no option with
Nvidia), same result. Maybe 'cause's working under XWayland?
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Can you please try Wayland? Seems to be an X11 bug...
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Title:
Second Monitor on HDMI blank screen/blink
PD: The mesa driver of intel's working with the same version of git,
just trying to make it work. But with the stable version doesn't work
neither. Just in case you wanted to know.
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apport information
** Tags added: apport-collected third-party-packages ubuntu
** Description changed:
I installed Ubuntu 20.04 on my ASUS laptop with Intel+Nvidia with propietary
drivers of Nvidia (I have 440.64 rn) and I connected a second monitor to use
it, but I saw that I cannot use
Well, let's start from `apport-collect 1871721`.
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Title:
Second Monitor on HDMI blank screen/blink screen
I'm sure around 99% it's Intel.
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel
Which graphics does the HDMI connect to? Intel or Nvidia?
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Second Monitor on HDMI blank screen/blink
Same result Kai-Heng. :(
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Title:
Second Monitor on HDMI blank screen/blink screen with Nvidia + Intel &
Please remove "quiet splash" from GRUB boot command line and see if it
helps.
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https://bugs.launchpad.net/bugs/1871721
Title:
Second Monitor on HDMI
** Description changed:
I installed Ubuntu 20.04 on my ASUS laptop with Intel+Nvidia with propietary
drivers of Nvidia (I have 440.64 rn) and I connected a second monitor to use
it, but I saw that I cannot use it, I just see a blank screen. I tried with a
TV of my room and same. The funny
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