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Old 07-23-2020, 06:50 PM   #1
Junior Member
Join Date: Jul 2020
Posts: 2
Default DisplayLink stopped working on 18.04

Came in today and my 2 Display Link Monitors are not working.
Dock: plugable ULTC4k (USB-C 4K)
uname -a:
xxxxxxx 5.4.0-42-generic #46~18.04.1-Ubuntu SMP Fri Jul 10 07:21:24 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
What I've tried:
connecting/disconnecting monitors and USB-C cable; cycling power on dock station; re-installing drivers (5.2.14).
Error on reinstalling:
ERROR (code 3): Failed to build evdi/5.2.14. Consult /var/lib/dkms/evdi/5.2.14/build/make.log for details..
The above-mentioned log has the following:

DKMS make.log for evdi-5.2.14 for kernel 5.4.0-42-generic (x86_64)
Thu Jul 23 13:39:02 EDT 2020
make KBUILD_VERBOSE=1 SUBDIRS=/var/lib/dkms/evdi/5.2.14/build SRCROOT=/var/lib/dkms/evdi/5.2.14/build CONFIG_MODULE_SIG= -C /lib/modules/5.4.0-42-generic/build modules
make[1]: Entering directory '/usr/src/linux-headers-5.4.0-42-generic'
make -f ./Makefile syncconfig
make -f ./scripts/ obj=scripts/basic
rm -f .tmp_quiet_recordmcount
make -f ./scripts/ obj=scripts/kconfig syncconfig
  flex -oscripts/kconfig/lexer.lex.c -L scripts/kconfig/lexer.l
/bin/sh: 1: flex: not found
scripts/ recipe for target 'scripts/kconfig/lexer.lex.c' failed
make[3]: *** [scripts/kconfig/lexer.lex.c] Error 127
make[3]: *** Waiting for unfinished jobs....
  bison -o scripts/kconfig/ --defines=scripts/kconfig/ -t -l scripts/kconfig/parser.y
/bin/sh: 1: bison: not found
scripts/ recipe for target 'scripts/kconfig/' failed
make[3]: *** [scripts/kconfig/] Error 127
Makefile:594: recipe for target 'syncconfig' failed
make[2]: *** [syncconfig] Error 2
Makefile:704: recipe for target 'include/config/auto.conf.cmd' failed
make[1]: *** [include/config/auto.conf.cmd] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-5.4.0-42-generic'
Makefile:22: recipe for target 'all' failed
make: *** [all] Error 2
Also ran lsusb -d 17e9:
lsusb -d 17e9:
Bus 004 Device 004: ID 17e9:6012 DisplayLink
I'm attaching logs from troubleshooting tool as well.
Attached Files
File Type: zip (70.1 KB, 2 views)

Last edited by Chuck; 07-23-2020 at 07:36 PM. Reason: Provide additional details
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