Public bug reported:
On the Raspberry Pi 400 the Night Light mode for the display seems to
have no effect. The display remains the same bright colour even when
the night light filter is enabled.
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: xorg 1:7.7+19ubuntu15
ProcVersionSignature: Ubuntu 5.8.0-1016.19-raspi 5.8.18
Uname: Linux 5.8.0-1016-raspi aarch64
ApportVersion: 2.20.11-0ubuntu50.5
Architecture: arm64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sat Mar 6 20:02:05 2021
DistUpgraded: Fresh install
DistroCodename: groovy
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
ImageMediaBuild: 20201022
Lspci-vt: -[0000:00]---00.0-[01]----00.0 VIA Technologies, Inc. VL805 USB 3.0
Host Controller
ProcEnviron:
LANGUAGE=en_CA:en
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_CA.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: coherent_pool=1M 8250.nr_uarts=0
snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1
snd_bcm2835.enable_headphones=1 video=HDMI-A-1:1680x1050M@60
smsc95xx.macaddr=DC:A6:32:E5:00:72 vc_mem.mem_base=0x3ec00000
vc_mem.mem_size=0x40000000 dwc_otg.lpm_enable=0 console=tty1
root=LABEL=writable rootfstype=ext4 elevator=deadline rootwait fixrtc quiet
splash
RebootRequiredPkgs: gnome-shell
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
acpidump:
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.102-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.10.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: apport-bug arm64 groovy ubuntu
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https://bugs.launchpad.net/bugs/1918029
Title:
Pi400 Night Light
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