Just upgraded to 20.10, same story. Works in discreet graphics mode but
is having hiccups - sometimes touchpad is not recognized, e.g. sometimes
on non-clean reboot, sometimes when reboot with external monitor
attached. Intermittent, clean reboot without attached peripherals seems
to always help.
This issue became apparent after installing Ubuntu 20.04.2 LTS. Switched
BIOS to discrete mode and touchpad works.
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Is there any news about it? Ubuntu 20.04.1, kernel 5.4.0-48, Nvidia CUDA
driver 455.23.05, ThinkPad P50, latest BIOS/firmware 1.62, with VGA
configured in discrete mode, integrated touchpad do not work.
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I confirm what zob wrote. I switched from Discrete to Hybrid mode in BIOS and
now touchpad work fine. I use Nvidia proprietary driver from ubuntu standard
repository (440.64), my only problem is screen tearing (PRIME profile set to
performance mode). I don't know if the drivers from PPA
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xserver-xorg-input-libinput (Ubuntu)
Status: New => Confirmed
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Thanks Nikolay. I'm not sure that what you link to is related. That
sounds much worse. My PC wasn't bricked. I just couldn't use the
touchpad if I also chose to install the Nvidia driver.
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There was a strong recommendation not to change "Hybrid" to "Discrete"
mode in BIOS - not sure if it is still a problem, just beware:
https://www.reddit.com/r/thinkpad/comments/a2g0k4/warning_do_not_change_from_hybrid_graphics_to/
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Ok. So I finally found a viable workaround (or fix). In BIOS the GPU
must be set to "Hybrid Graphics" NOT "Discrete".
This fixed my issues with running nvdia-drivers and using my touchpad at
the same time in ubuntu 20.04.
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Ahh. Actually xinput now (with kubuntu-desktop installed) now has
registered my touchpad as a standard mouse it seems (I don't have
multitouch functionality, so no two-finger scrolling, etc).
$ xinput list
⎡ Virtual core pointer id=2[master pointer (3)]
⎜ ↳ Virtual
I though I might experiment a little. I installed xubuntu-desktop with the
lightdm display manager. Didn't work either. Then I installed kubuntu-desktop
with sddm display manger and the suddenly my touchpad started working.
I then did a dpkg-reconfigure gdm3, rebooted and logged back into the
I just tested installing the Nvidia binaries directly from the web-site. That
did not fix the issue with the non-functional touchpad either.
That was the driver version 440.82
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Yes. This is still an issue on the P50, same machine as above.
Now on kernel: 5.4.0-21-generic
xserver-xorg-input-libinput v. 0.29.0-1
And I've tested with the 3 different Nvidia drivers listed in the additional
drivers interface.
That would be nvidia-drivers:
440.64-0ubuntu3
435.21-0ubuntu7
This also happens in 20.04.
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Title:
Synaptic touchpad not responding in ubuntu 19.04 when using nvidia
drivers
Have the same problems on p50 after installing NVIDIA-Linux-x86_64-440.64.
Linux 5.3.0-40-generic #32-Ubuntu SMP Fri Jan 31 20:24:34 UTC 2020
x86_64 x86_64 x86_64 GNU/Linux
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A very similar thing just happened to me, with the 435 drivers via ppa.
Reverting to 430 solved it. Ubuntu 19.04, P50. USB mouse works.
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I just tested against the mainline kernel: 5.1.0-050100rc6-generic
#201904211830 SMP Sun Apr 21 18:33:49 UTC 2019 x86_64 x86_64 x86_64
GNU/Linux
This didn't work - or rather there was an error building with dkms and
nvidia (so actually it works, but that's because I'm back on noveau
drivers,
Oh, and forgot to mention that an external optical usb mouse works just
fine.
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Title:
Synaptic touchpad not
** Attachment added: "Xorg.0.log"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-libinput/+bug/1826597/+attachment/5259335/+files/Xorg.0.log
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Btw adding synaptic_intertouch=0 to the parameters at boot doesn't
change anything.
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Title:
Synaptic touchpad not
** Attachment added: "evtest"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-libinput/+bug/1826597/+attachment/5259333/+files/evtest
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** Attachment added: "nvidia-bug-report.log"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-libinput/+bug/1826597/+attachment/5259334/+files/nvidia-bug-report.log
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** Attachment added: "devices"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-libinput/+bug/1826597/+attachment/5259332/+files/devices
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