[Solved] System freezes every 30 seconds

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[Solved] System freezes every 30 seconds

Postby Dobeedoo » 2018-06-29 19:36

Hi,
running Debian 9, latest patches & updates from APT. I am experiencing periodic system-wide freezes. Everything seems to halt for a second (maybe little less). For example streamed video stops briefly, while writing something in a text editor, the cursor hangs for the same amount of time etc. No matter what, it gets interrupted every 30 seconds. This is really very annoying. Does anyone else have this phenomena, or am I the only lucky one? I am almost about to reinstall, but as it being Linux, that should really not be necessary. Does any one know what this is, and what can be done to mitigate it? I don't know where to start looking...

Thanks
Last edited by Dobeedoo on 2018-06-30 12:03, edited 1 time in total.
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Re: System freezes every 30 seconds

Postby GarryRicketson » 2018-06-29 20:53

Does anyone else have this phenomena, or am I the only lucky one?

Just a quick search, apparently you are not the only one.
http://forums.debian.net/search.php?keywords=+System+freezes+every+30+seconds
Search found 1149 matches: +System +freezes
and
Search found 97 matches: +System +freezes +every +seconds

Not much one can say with out any details , such as what Window Manager you use, or is it a Desktop Environment ? Etc,...
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Re: System freezes every 30 seconds

Postby Bulkley » 2018-06-29 20:59

Have you timed it? Is it a precise 30 seconds? What else happens at 30 second intervals? Is this a laptop? Is there some sort of power saver interfering?

System freezes are very often hardware. You may have something showing early signs of failure.

Try booting up a live-CD or USB. Run with it for a couple of days. If the live OS runs without freezes either your hard drive is on the skids or you have a software problem.

Back up anything valuable while you can.
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Re: System freezes every 30 seconds

Postby GarryRicketson » 2018-06-29 21:07

If you do look at the search results, you will notice in most cases some details are needed;
For example:http://forums.debian.net/viewtopic.php?f=10&t=134878&p=655681&hilit=System+freezes+every+30+seconds#p655690
by stevepusser »---snip---Problems like yours can also very often be due to missing non-free firmware, due to it not being included in the standard install. This is a feature of Debian, not a bug. :D If you installed inxi and provided the output of
Code: Select all
inxi -F

this can supply a lot of clues to what might be going on.

DO NOT run it (inxi) as root or sudo, and the -F must be upper-case -F,
Only run something as root, if specifically instructed to do so.

Again, sorry to be redundant, but without any real details and info, everything else is just guess work.
The output in a "dmesg" also might have some info.
https://manpages.debian.org/stretch/util-linux/dmesg.1.en.html
But maybe more up-to-date :
https://manpages.debian.org/stretch/systemd/journalctl.1.en.html
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Re: System freezes every 30 seconds

Postby Dobeedoo » 2018-06-30 05:16

GarryRicketson wrote:If you do look at the search results, you will notice in most cases some details are needed;
For example:http://forums.debian.net/viewtopic.php?f=10&t=134878&p=655681&hilit=System+freezes+every+30+seconds#p655690
by stevepusser »---snip---Problems like yours can also very often be due to missing non-free firmware, due to it not being included in the standard install. This is a feature of Debian, not a bug. :D If you installed inxi and provided the output of
Code: Select all
inxi -F

this can supply a lot of clues to what might be going on.

DO NOT run it (inxi) as root or sudo, and the -F must be upper-case -F,
Only run something as root, if specifically instructed to do so.

Again, sorry to be redundant, but without any real details and info, everything else is just guess work.
The output in a "dmesg" also might have some info.
https://manpages.debian.org/stretch/util-linux/dmesg.1.en.html
But maybe more up-to-date :
https://manpages.debian.org/stretch/systemd/journalctl.1.en.html


Thanks for responding! I fully understand you must have further details in order to be able to help, and I appriciate that. The output from inxi -F below
Code: Select all
System:    Host: hostname Kernel: 4.9.0-6-amd64 x86_64 (64 bit)
           Desktop: Cinnamon 3.2.7  Distro: Debian GNU/Linux 9 (stretch)
Machine:   Device: laptop System: LENOVO product: 80WK v: Lenovo Y520-15IKBN
           Mobo: LENOVO model: LNVNB161216 v: SDK0J40709 WIN
           UEFI: LENOVO v: 4KCN30WW date: 08/31/2017
Battery    BAT0: charge: 45.6 Wh 100.0% condition: 45.6/45.0 Wh (101%)
CPU:       Quad core Intel Core i5-7300HQ (-MCP-) cache: 6144 KB
           clock speeds: max: 3500 MHz 1: 799 MHz 2: 799 MHz 3: 800 MHz
           4: 799 MHz
Graphics:  Card-1: Intel Device 591b
           Card-2: NVIDIA Device 1c8d
           Display Server: X.Org 1.19.2 drivers: modesetting (unloaded: fbdev,vesa)
           Resolution: 1920x1080@60.00hz
           GLX Renderer: Mesa DRI Intel Kabylake GT2
           GLX Version: 3.0 Mesa 13.0.6
Audio:     Card Intel Device a171 driver: snd_hda_intel
           Sound: Advanced Linux Sound Architecture v: k4.9.0-6-amd64
Network:   Card-1: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter
           driver: ath10k_pci
           IF: N/A state: N/A mac: N/A
           Card-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
           driver: r8169
           IF: enp4s0 state: up speed: 1000 Mbps duplex: full
           Card-3: Atheros
           IF: null-if-id state: N/A speed: N/A duplex: N/A mac: N/A
Drives:    HDD Total Size: NA (-)
           ID-1: /dev/nvme0n1 model: N/A size: 256.1GB
Partition: ID-1: / size: 226G used: 42G (20%) fs: ext4 dev: /dev/dm-1
           ID-2: /boot size: 237M used: 95M (43%) fs: ext2 dev: /dev/nvme0n1p2
           ID-3: swap-1 size: 8.46GB used: 0.00GB (0%) fs: swap dev: /dev/dm-2
Sensors:   System Temperatures: cpu: 45.0C mobo: N/A
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 200 Uptime: 5 days Memory: 2053.1/7862.3MB
           Client: Shell (bash) inxi: 2.3.5


Hope it can give an indication of the problem,

Thanks
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Re: System freezes every 30 seconds

Postby Dobeedoo » 2018-06-30 05:23

Bulkley wrote:Have you timed it? Is it a precise 30 seconds? What else happens at 30 second intervals? Is this a laptop? Is there some sort of power saver interfering?

System freezes are very often hardware. You may have something showing early signs of failure.

Try booting up a live-CD or USB. Run with it for a couple of days. If the live OS runs without freezes either your hard drive is on the skids or you have a software problem.

Back up anything valuable while you can.


Hi,
Yes, I timed it, I tried to look at the /etc/top utility, saw nothing unusual, no spiking cpu or memory. I also used Wireshark to see if the traffic was affected, but couldn't see any evidence related to the freezes.
It is a laptop, no power saving at 30 minute intervals is configured.
Both computer and the disk is quite new, so really hope its not hardware related. To me it feels more like a SW problem, but I'm here because I need help to find out :)
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Re: System freezes every 30 seconds

Postby Dobeedoo » 2018-06-30 12:01

I got a little frustrated and reinstalled Debian 9.4. After installing only basic + gnome, sudo, terminator and chromium I tested again, and problem was now gone. A bit cumbersome perhaps, but for a home system it was probably the fastest solution.
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