Public bug reported:
This system runs Ubuntu 20.04, freshly installed 3~4 months ago (July
2020).
There is two kernels available on this system:
- 5.4.0-47-generic
- 5.4.0-48-generic
With kernel 5.4.0-47-generic:
- GNOME shell loads properly on Radeon X1950 PRO,
- Unvanquished game runs on ATI Radeon X1950 PRO at 70 fps on 1280×720
resolution,
- Unvanquished game runs on ATI Radeon 9500 at 40 fps on 640×480 resolution.
Everything looks consistent with the limits and the age of the hardware.
With kernel 5.4.0-48-generic:
- GNOME Shell never finish to load on Radeon X1950 PRO, either a grey screen is
displayed and keyboard shortcuts does not respond, or the top bar is stuck
between the center and the top of the screen and the shell does not respond, or
the top bar on the top of the screen but the shell does not respond, to get a
desktop I run `sudo systemctl stop display-manager` then `startx
/usr/bin/lxsession` from a TTY. Running GNOME Shell with startx or from a lone
xterm started with startx leads to same issues.
- Unvanquished game runs on ATI Radeon X1950 PRO at 7 fps on 1280×720
resolution,
- Unvanquished game runs on ATI Radeon 9500 at 3 fps on 640×480 resolution.
Note: for unknown reasons, GNOME Shell loads properly on the ATI Radeon
9500 but not on the Radeon X1950 PRO.
Everything is slow. When the game is running, a very high load is
reported by htop, which does not look like the experience seen on the
5.4.0-47-generic kernel. When the game is running cycling between
windows using Alt-Tab takes a lot of second while it's immediate on
5.4.0-47-generic kernel. Also, even without the game running or on a
lightweight desktop like LXDE, cycling windows is not smooth and window
refreshing is slow enough to be noticeable.
About the hardware, note that:
- the CPU only has one core, no hyperthreading (AMD Athlon 64 FX for socket
939),
- the GPUs are AGP ones using R300 and R500 technology (pre-TeraScale),
- there is 3GB of DDR RAM,
- there is no on-disk swap but zram-based swap in compressed ram is used,
- system is stored on and boots from an USB 3.1 key plugged on an USB 2.0 port,
- /tmp is a tmpfs ram disk,
- CPU is set to performance profile,
- the install is not really messy and not many packages are installed, this USB
key is purposed for hardware/system testing and to diagnose such issues.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-48-generic 5.4.0-48.52
ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60
Uname: Linux 5.4.0-48-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.9
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: illwieckz 7503 F.... pulseaudio
CasperMD5CheckResult: skip
Date: Sun Oct 11 01:47:48 2020
InstallationDate: Installed on 2020-07-09 (93 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
IwConfig:
enp0s11 no wireless extensions.
lo no wireless extensions.
MachineType: MSI MS-6702E
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
LANG=fr_FR.UTF-8
SHELL=/bin/bash
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-48-generic
root=UUID=10314d0c-ec6b-4f7f-b926-ed8b80185331 ro
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-5.4.0-48-generic N/A
linux-backports-modules-5.4.0-48-generic N/A
linux-firmware 1.187.3
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/12/2006
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 080011
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: MS-6702E
dmi.board.vendor: MSI
dmi.board.version: 1.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr080011:bd10/12/2006:svnMSI:pnMS-6702E:pvr1.0:rvnMSI:rnMS-6702E:rvr1.0:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: MS-6702E
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: 1.0
dmi.sys.vendor: MSI
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1899304
Title:
Huge performance regression, Unvanquished game goes from 70fps to
7fps, GNOME Shell never finishes to load, GNOME desktop unusable
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