Failed to start adjustment method randr. Trying next method... Using method `vidmode'. Waiting for initial location to become available... Location: 35.46 N, 92.03 W

[Bashing-om]

command: ' redshift -l 35.458866:-92.033032 -t 5500:4000 -b 0.8:0.6 & disown ' works as expected in 18.04, however, in 18.10 and 19.04 fails with the advisements:
"Failed to start adjustment method randr.
Trying next method...
Using method `vidmode'.
Waiting for initial location to become available...
Location: 35.46 N, 92.03 W"

Redshift is active per:
ps -e | grep redshift
 1683 pts/2 00:00:00 redshift
sysop@x1904:~$

But there is no adjustment to the screen display .

regards

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: redshift 1.12-2
ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
Uname: Linux 4.18.0-10-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.10-0ubuntu14
Architecture: amd64
CurrentDesktop: XFCE
Date: Tue Nov 13 16:28:32 2018
InstallationDate: Installed on 2018-05-20 (177 days ago)
InstallationMedia: Xubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180520)
SourcePackage: redshift
UpgradeStatus: Upgraded to disco on 2018-11-07 (6 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.