[RTL8821CE] awful performance

[Das MC]

In most application there is "not responding" window displayed. Firefox, Google Chrome, Google Remote Desktopm (=Chrome). In Google Remote Desktop the sound is transfered in a "okish" delay. The display of the remote machine is delayed by about 2-5 seconds.

The laptop is connected by wifi, the remote machine is connected by lan cable.
The problem also occur if the laptop is used in the same network about 2-3 meters away.

There seems to be a driver issue. If graphic, "chipset", ram or harddisk: I dont know. The machine is very old but is quad core with 4 gb of ram. There SHOULD be a better performance.
I used a dual core about 3-4 years ago and the performance was similar to this laptop now.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu3
ProcVersionSignature: Ubuntu 6.8.0-41.41-generic 6.8.12
Uname: Linux 6.8.0-41-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
BootLog: Error: [Errno 13] Keine Berechtigung: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Tue Aug 27 05:28:35 2024
DistUpgraded: 2024-05-10 01:30:53,777 DEBUG migrateToDeb822Sources()
DistroCodename: noble
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Stoney [Radeon R2/R3/R4/R5 Graphics] [1002:98e4] (rev d4) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Stoney [Radeon R2/R3/R4/R5 Graphics] [103c:84d0]
InstallationDate: Installed on 2023-08-26 (366 days ago)
InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Release amd64 (20230418)
MachineType: HP HP Laptop 17-ca0xxx
ProcEnviron:
 LANG=de_DE.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-41-generic root=UUID=23ccbdb2-528b-483e-9b2f-bd788ab9318a ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to noble on 2024-05-09 (109 days ago)
dmi.bios.date: 11/27/2023
dmi.bios.release: 15.66
dmi.bios.vendor: AMI
dmi.bios.version: F.66
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 84D0
dmi.board.vendor: HP
dmi.board.version: 90.48
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.ec.firmware.release: 90.48
dmi.modalias: dmi:bvnAMI:bvrF.66:bd11/27/2023:br15.66:efr90.48:svnHP:pnHPLaptop17-ca0xxx:pvr:rvnHP:rn84D0:rvr90.48:cvnHP:ct10:cvrChassisVersion:sku5CU45EA#ABD:
dmi.product.family: 103C_5335KV HP Notebook
dmi.product.name: HP Laptop 17-ca0xxx
dmi.product.sku: 5CU45EA#ABD
dmi.sys.vendor: HP
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.120-2build1
version.libgl1-mesa-dri: libgl1-mesa-dri 24.0.9-0ubuntu0.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1

[Daniel van Vugt (vanvugt)]

Thanks for the bug report. I can see two main problems here:

1. The amdgpu kernel graphics driver is emitting warnings that look like crashes.
2. The rtw_8821ce kernel wifi driver is flooding the system log (this is probably the performance issue).

So I can only suggest trying an older Ubuntu release like 22.04.0 with an older kernel:

  https://old-releases.ubuntu.com/releases/jammy/ubuntu-22.04-desktop-amd64.iso

or trying newer kernels from:

  https://kernel.ubuntu.com/mainline/?C=M;O=D

or disable wifi and use wired networking;
or replace the wifi card in the laptop with an Intel one.

[Das MC (das-mc)]

Thanks for the answer. Wired network is not possible here, so wifi is required. :(
Reinstalling with an older version is currently also not possible due to missing usb sticks. So at first I need to be home to decide which way is the best. But building a new kernel and switching to it without deeper experience and a fallback would be too hard for me.