Thanks Josh.
I *think* that there are two issues you are facing:
1. The nouveau kernel driver doesn't support your Nvidia GPU properly,
which is why "I have to boot with `nouveau.modeset=0`, otherwise boot
hangs at Plymouth after entering my disk encryption password.". But that
doesn't matter
> Does using a Wayland session avoid the bug?
Yes, I see no tearing in Totem (or Chrome) when using Wayland. (Note:
after uninstalling the Nvidia drivers (`apt purge nvidia-driver-410 &&
apt autoremove --purge`), I have to boot with `nouveau.modeset=0`,
otherwise boot hangs at Plymouth after
Thanks.
Next I would like to confirm if this is really a pure Intel bug. Just
for testing, can you please try uninstalling the Nvidia driver, reboot
and then log into "Ubuntu on Wayland"?
Does using a Wayland session avoid the bug?
Please also run 'xrandr' in the Wayland session and send us the
Also, what shell are you using?
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https://bugs.launchpad.net/bugs/1811808
Title:
Tearing and/or flickering when using Intel graphics
Status in gnome-shell package
** Attachment added: "Tearing in Totem with modesetting driver"
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/1811808/+attachment/5230257/+files/totem-tearing.jpg
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I'm using only one monitor (the one built-in to the laptop), at times I
use an external monitor as well, but this problem persists without it
plugged in.
After removing that block (i.e. using the modesetting driver), I get
jagged tearing almost everywhere. Both Chrome and Totem tear very
Thanks for those files. I can see two possible problems (which may not
be problems but should be checked):
1. You are configured to use both the Nvidia driver version 410, and are
asking Xorg to configure the old Intel driver. In theory this should be
possible but OpenGL is really a very simple
** Attachment added: "Xorg.0.log"
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/1811808/+attachment/5230058/+files/Xorg.0.log
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This Xorg.1.log was last modified in November, so I'm unsure if it's
relevant.
** Attachment added: "Xorg.1.log"
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/1811808/+attachment/5230059/+files/Xorg.1.log
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I don't have an /etc/X11/xorg.conf, but I do have (along with the
various distribution-provided files) a
/usr/share/X11/xorg.conf.d/99-custom.conf.
** Attachment added: "99-custom.conf"
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/1811808/+attachment/5230057/+files/99-custom.conf
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Unfortunately, the BIOS doesn't have an option to disable the Nvidia
GPU.
** Attachment added: "allpackages.txt"
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/1811808/+attachment/5230056/+files/allpackages.txt
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Thanks.
I wonder if this bug is directly related to "using Intel graphics on my
hybrid Nvidia laptop". Since regular Intel GPU users never seem to see
such problems. Although this is also one of the first bug reports about
a Coffee Lake GPU I have seen too, so it might be an Intel problem...
1.
Removing gstreamer1.0-vaapi doesn't appear to help.
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Title:
Tearing and/or flickering when using Intel graphics
Status in totem
** Attachment added: "Output of `vainfo`"
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/1811808/+attachment/5229623/+files/vainfo
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** Attachment added: "Output of `lspci -k`"
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/1811808/+attachment/5229624/+files/lspci
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** Attachment added: "Output of `lscpu`"
https://bugs.launchpad.net/ubuntu/+source/totem/+bug/1811808/+attachment/5229622/+files/lscpu
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5. Please also run 'lspci -k' and send us the output.
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Title:
Tearing and/or flickering when using Intel graphics
Status in totem
Thanks for the detailed bug report. That jagged black tearing is the
result of unsynchronized nonlinear buffers being used on screen.
Can you please try these in order?
1. Run 'lscpu' and send us the output.
2. Run: sudo apt install vainfo
3. Run 'vainfo' and send us the output.
4. Try this
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