I have the same problem also ob a different partition of same PC with
Groovy installed from Ubuntu 20.10 "Groovy Gorilla" - Alpha amd64
(20200714)
mao@corrado-n7-gg-0714:~$ inxi -SCMx
System: Host: corrado-n7-gg-0714 Kernel: 5.8.0-18-generic x86_64 bits: 64
compiler: N/A Desktop: N/A
Distro: Ubuntu 20.10 (Groovy Gorilla)
Machine: Type: Laptop System: Dell product: Inspiron 3793 v: N/A serial:
<superuser/root required>
Mobo: Dell model: 0C1PF2 v: A00 serial: <superuser/root required>
UEFI: Dell v: 1.5.0
date: 12/17/2019
CPU: Info: Quad Core model: Intel Core i5-1035G1 bits: 64 type: MT MCP
arch: Ice Lake rev: 5
L2 cache: 6144 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
bogomips: 19046
Speed: 1834 MHz min/max: 400/3600 MHz Core speeds (MHz): 1: 2946 2:
708 3: 2539 4: 1143
5: 3355 6: 2893 7: 1421 8: 1683
mao@corrado-n7-gg-0714:~$
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1893568
Title:
[Dell Inspiron 3793] Screen brightness missing
Status in linux package in Ubuntu:
Confirmed
Bug description:
gnome-control-center - power - Screen brightness is missing.
also on top bar Screen brightness control appears but does nothing.
the problem does not happen on same PC, different partition with Ubuntu 20.04
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: gnome-control-center 1:3.37.90-1ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu45
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Aug 30 19:47:23 2020
ExecutablePath: /usr/bin/gnome-control-center
InstallationDate: Installed on 2020-08-28 (2 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Alpha amd64 (20200826)
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu45
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: corrado 1277 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 20.10
InstallationDate: Installed on 2020-08-28 (3 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Alpha amd64 (20200826)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0bda:5520 Realtek Semiconductor Corp.
Integrated_Webcam_HD
Bus 001 Device 002: ID 145f:02a9 Trust Trust Wireless Mouse
Bus 001 Device 004: ID 0cf3:e009 Qualcomm Atheros Communications
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. Inspiron 3793
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-42-generic
root=UUID=5266d63d-2387-4de3-8bae-6c9f95af7d6e ro quiet splash
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
RelatedPackageVersions:
linux-restricted-modules-5.4.0-42-generic N/A
linux-backports-modules-5.4.0-42-generic N/A
linux-firmware 1.190
Tags: groovy
Uname: Linux 5.4.0-42-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 12/17/2019
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.5.0
dmi.board.name: 0C1PF2
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.5.0:bd12/17/2019:svnDellInc.:pnInspiron3793:pvr:rvnDellInc.:rn0C1PF2:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: Inspiron
dmi.product.name: Inspiron 3793
dmi.product.sku: 097A
dmi.sys.vendor: Dell Inc.
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