Thanks. This looks like the cause of high disk IO at least:
jan 3400 0.0 0.0 2600 676 pts/8 S Dez07 0:00 /bin/sh
/usr/bin/bcompare RAID/Incoming/NAS-DATEN/ jan/NAS-DATEN/
jan 3412 70.7 11.3 2759972 1851804 pts/8 Sl Dez07 900:13
/usr/bin/bcompare RAID/Incoming/NAS-DATEN/ jan/NAS-DATEN/
** Changed in: linux (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1852001
Title:
KDE GUI freeze on high disk IO, but disabling swap fixes it
Status in linux package in Ubuntu:
New
Bug description:
I've got massive problems with GUI on my PC.
The attached logs are from the following setting:
- high disk load (f3write)
- kernel 4.15.0-1050-oem (the only 4x kernel available in eoan)
- no swap available
These are the parameters (disk load, kernel, swap) I am fiddling with
to find out the cause, see below.
In general
- the problem happens once a day with any 5.0 or 5.3 kernel from eoan repo
- more likely to happen with high disk or CPU load, but not necessarily.
- less likely with the 4.x kernel mentioned above.
I just installed the following kernels from kernel-ppa:
5.3.10-050310-generic
5.4.0-050400rc6-generic
5.4.0-997-generic (drm-intel-next)
Now I am waiting for the freeze to occur again.
The problem started about half a year ago.
There have been three changes that happened at the time and could be the cause
- switch to kernel 5.x
- update to Ubuntu 19.4
- swapped motherboard, CPU and RAM.
The hassle started with the following scenario, repeated often:
- high disk load
- PC becomes laggy
- soon dies/freezes
The longer I waited, the deeper the lockdown went. but I don't know the exact
details.
The first cause I found was kswapd running amok and take the system with it.
Workaround: add swap space.
Now the problem shifted: Whenever I got high disk load (eg dd 100 GB
of data) the kernel swaps likle crazy and makes the GUI first lag soon
freeze. but no excessive CPU load any more, as kswapd does not go
crazy.
Again I found a workaround:
the above mentioned 4.x kernel. In this case the GUI lags as expected from a
heavily swapping system. nothing more.
but still sometimes the GUI simply freezes (the error reported at the top)
Another workaround is to completely remove swap. Let's see what
happens, if kswapd goes amok again.
I am not sure as how these problems are related.
I did extensive hardware check like
- memtest86 newest version, no "may be vulnerable to high frequency row
hammering"
- smart
do you suggest any burn in test suites?
thanks
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: xorg 1:7.7+19ubuntu12
ProcVersionSignature: Ubuntu 4.15.0-1050.57-oem 4.15.18
Uname: Linux 4.15.0-1050-oem x86_64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
Date: Sun Nov 10 15:55:14 2019
DistUpgraded: 2019-10-19 13:35:30,394 DEBUG entry '# deb
http://ppa.launchpad.net/brandonsnider/cdrtools/ubuntu cosmic main # disabled
on upgrade to eoan' was disabled (unknown mirror)
DistroCodename: eoan
DistroVariant: ubuntu
DkmsStatus:
virtualbox, 6.0.14, 5.3.0-18-generic, x86_64: installed
virtualbox, 6.0.14, 5.3.0-19-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation UHD Graphics 630 (Desktop 9 Series) [8086:3e98] (prog-if
00 [VGA controller])
Subsystem: Micro-Star International Co., Ltd. [MSI] UHD Graphics 630
(Desktop 9 Series) [1462:7b16]
InstallationDate: Installed on 2017-12-16 (693 days ago)
InstallationMedia: Kubuntu 17.10 "Artful Aardvark" - Release amd64
(20171017.1)
MachineType: Micro-Star International Co., Ltd. MS-7B16
ProcEnviron:
LANGUAGE=en_US:en
TERM=linux
PATH=(custom, no user)
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-1050-oem
root=UUID=ca93bfbd-335a-4cc7-9d0f-f0da18447497 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: Upgraded to eoan on 2019-10-19 (22 days ago)
dmi.bios.date: 08/13/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2.80
dmi.board.asset.tag: Default string
dmi.board.name: B360 GAMING PRO CARBON (MS-7B16)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 1.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr2.80:bd08/13/2019:svnMicro-StarInternationalCo.,Ltd.:pnMS-7B16:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnB360GAMINGPROCARBON(MS-7B16):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0:
dmi.product.family: Default string
dmi.product.name: MS-7B16
dmi.product.version: 1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.99-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 19.2.1-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 19.2.1-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.5+git20191008-0ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.1-1ubuntu1
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
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