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DisplayLink / evdi

Extensible Virtual Display Interface
MIT License
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Monitor not detected and trouble building evdi, Pop!_os, kernel 6.2.6 #411

Closed absolu-darancourt closed 1 year ago

absolu-darancourt commented 1 year ago

Since the last update, I cannot for the life of me make my 3rd monitor work. I've had trouble in the past with kernel updates and the displaylink usb monitor stopping working but i've always managed using the EVDI repo. I've tried with the method of cloning the repo with a make and make install and patching the installer by forcing it to use the repo evdi, as well as other stuff i dont fully unerstand.

The method that always worked in the past for me was compiling and installing with make. but this time i cant because of first and SSL error which I corrected using this method.

but after make install i still have no evdi in the list outputed with dkms status. Here is the make install output:

make -C /lib/modules/6.2.0-76060200-generic/build M=$PWD INSTALL_MOD_PATH= INSTALL_MOD_DIR=/kernel/drivers/gpu/drm/evdi modules_install
make[1]: Entering directory '/usr/src/linux-headers-6.2.0-76060200-generic'
  INSTALL /lib/modules/6.2.0-76060200-generic//kernel/drivers/gpu/drm/evdi/evdi.ko
  SIGN    /lib/modules/6.2.0-76060200-generic//kernel/drivers/gpu/drm/evdi/evdi.ko
  DEPMOD  /lib/modules/6.2.0-76060200-generic
Warning: modules_install: missing 'System.map' file. Skipping depmod.
make[1]: Leaving directory '/usr/src/linux-headers-6.2.0-76060200-generic'
true

Thanks in advance for your help

System information:

absolu-darancourt commented 1 year ago

I'm stupid, I renamed the symlink to evdi-1.13.1 thinking I needed to do it since the version changed. I did not. Reinstalling everything using symlink name evdi-1.12.0 and it works.

Closing.

patriciabocho commented 1 year ago

Could you let me know how exactly you build evdi? Or link me to a resource I can use to learn how to do this?

I'm a new-ish linux user and haven't had to do anything like this in the past. I'm trying to do the exact thing you're doing I think: use a displaylink enabled docking station for a multiple monitor setup (2 in my case) but the displaylink driver installation is hanging up on the evdi dependency.

System information:

Are you using the latest driver?
Yes (5.6.1-59.184)

Are you using the latest EVDI version?
Yes (1.13.1)

If you are using a DisplayLink device, have you checked 'troubleshooting'
on DisplayLink's website?
Yes

Is this issue related to evdi/kernel?
I think so. Here's the error I get.

make -C /lib/modules/6.2.6-76060206-generic/build M=$PWD make[2]: Entering directory '/usr/src/linux-headers-6.2.6-76060206-generic'

ERROR: Kernel configuration is invalid. include/generated/autoconf.h or include/config/auto.conf are missing. Run 'make oldconfig && make prepare' on kernel src to fix it.

Linux distribution and its version : Pop!_OS 22.04

Linux kernel version 6.2.6-76060206-generic

Xorg version: x11 2:21.1.3-2ubuntu2.9

Desktop environment in use: Gnome (I think, default of pop!_os)
absolu-darancourt commented 1 year ago

Try this method You also need to install the official drivers you can download on displaylink's website. Hope this helps.