Public bug reported:
in the past, I've used DisplayCalGUI to calibrate my displays. however,
that software hasn't been updated to use Python3 properly, so it doesn't
run on recent Ubuntu releases. I thought I'd try the builtin gnome
calibration, but it seems completely broken on 20.10. I've tried two
difference systems with fresh minimal installs, each has a different
display and a different brand of colour calibration hardware. in both
cases, they get to testing the coloured swatches, and fail, with an
error saying:
"Calibration failed!
An internal error occurred that could not be recovered. You can remove
the calibration device."
however, looking in the output from `journalctl`, colord seems to claim that it
succeeded in generating a profile. So I'm guessing there's something broken in
the integration between colord and gnome-settings? all I know is it reports
that it failed, and gnome doesn't show any new profile to use. here's the
`journalctl` output:
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: No of test patches = 64
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Omitted 0 zero
measurements
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Find white & black points
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Initial white point =
1.051779 0.999535 0.796168
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Creating matrix...
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: [46B blob data]
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Matrix = 0.615651
0.622859 0.645454
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: 0.647113
0.653246 0.680660
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: 0.531396
0.531212 0.553325
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Creating matrix and
single gamma curve...
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: [26B blob data]
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Matrix = 0.009811
0.389211 0.558809
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: 0.144281
0.347751 0.505066
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: 0.198306
0.283542 0.312788
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Gamma = -1.574397
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Doing White point fine
tune:
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Before fine tune, rel WP
= XYZ 0.95783065 0.99709777 0.79463644, Lab 99.887672 -0.619729 2.283133
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: After fine tune, rel WP
= XYZ 0.96420288 1.00000000 0.82490540, Lab 100.000000 0.000000 0.000000
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: abs WP
= XYZ 1.04542265 0.99666916 0.76687003, Lab 99.871064 14.218222 4.582465
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Black point XYZ =
1.04542265 0.99666916 0.76687003, Lab = 99.871064 14.218222 4.582465
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Scaling White Point by
1.003342 to make Y = 1.0
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Display Luminance =
0.940928
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: White point XYZ =
1.048916 1.000000 0.769433
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Black point XYZ =
1.048916 1.000000 0.769433
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Done gamma/shaper and
matrix creation
Dec 23 13:47:29 krait.sudo.prv colord-session[514703]: Profile done
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: colord 1.4.4-2build1
ProcVersionSignature: Ubuntu 5.8.0-33.36-generic 5.8.17
Uname: Linux 5.8.0-33-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu50.3
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: X-Cinnamon
Date: Wed Dec 23 13:51:43 2020
SourcePackage: colord
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: colord (Ubuntu)
Importance: Undecided
Status: New
** Affects: gnome-control-center (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug groovy
** Also affects: gnome-control-center (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1909152
Title:
color calibration fails when using gnome gui on 20.10
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