Looping dkms dlm evdi DisplayLink service failure in syslog
The following looped with just a few seconds pause in /var/log/syslog: sh: make -j4 KERNELRELEASE=x.x.x-x all INCLUDEDIR=/lib/modules/x.x.x-x/build/include KVERSION=4.19.0-6-amd64 DKMS_BUILD=1...(bad exit status: 2) sh: Error! Bad return status for module build on kernel: 4.19.0-6-amd64 (x86_64) sh: Consult /var/lib/dkms/evdi/1.3.52/build/make.log for more information. systemd: dlm.service: Control process exited, code=exited, status=10/n/a systemd: dlm.service: Failed with result 'exit-code'. systemd: Failed to start DisplayLink Manager Service. systemd: dlm.service: Service RestartSec=5s expired, scheduling restart. systemd: dlm.service: Scheduled restart job, restart counter is at 1869. systemd: Stopped DisplayLink Manager Service. systemd: Starting DisplayLink Manager Service... sh: modprobe: FATAL: Module evdi not found in directory /lib/modules/4.19.0-6-amd64 sh: Kernel preparation unnecessary for this kernel. Skipping... sh: Building module: sh: cleaning build area...(bad exit status: 2) ps ax also displayed the following repeatedly: /bin/sh -c 'modprobe evdi || (dkms install evdi/1.3.52 && modprobe evdi)' I checked Synaptic, but no sign of evdi or dlm there. I checked the log at the suggested location without much clue how to get rid of this problem. I tried adding a file to /etc/modprobe.d/evdi.conf containing the line blacklist evdi. I tried the old classic to move the directory out of the way. Moving /var/lib/dkms/evdi did not help, it created a new one. What did do something though was to move /usr/src/evdi-1.3.52 out of the src directory, then it started complaining that it did not find the files to build - better than nothing. I found that there was a service file, located at /etc/systemd/system/multi-user.target.wants/dlm.service. This is the content of that file: [Unit] Description=DisplayLink Manager Service After=display-manager.service Conflictsfirstname.lastname@example.org [Service] ExecStartPre=/bin/sh -c 'modprobe evdi || (dkms install evdi/1.3.52 && modprobe evdi)' ExecStart=/opt/displaylink/DisplayLinkManager Restart=always WorkingDirectory=/opt/displaylink RestartSec=5 [Install] WantedBy=multi-user.target This file is not good. I interpret it as the following: 1. Try to probe for the evdi module. 2. If that fails, run DKMS to install evdi/version number and then probe again for the evdi module 3. If still has not started after 5 seconds - start over again. There is no protection whatsoever built in for if the build or the probing fails repeatedly. To check status for this service I did this: systemctl status dlm.service To get rid of the problem I removed it all: # stop it systemctl stop dlm.service # remove the file systemctl disable dlm.service rm /lib/systemd/system/dlm.service # reload and reset systemctl daemon-reload systemctl reset-failed rm -rf /usr/src/evdi-1.3.52 2020-02-18
Had to do rm -rf /var/lib/dkms/evdi to get rid of error during build.
This is a personal note. Last updated: 2020-02-18 13:26:48.