Dell Optiplex 990 random freezing

Hello -
I recently did a fresh install of Manjaro XFCE on a Optiplex 990 with a i7-2600 and 8 gb ram on a SSD. Since the install I've experienced random system freezing forcing me to power cycle the computer. It's locked up while running firefox, chromium, and thunderbird on both 4.14.85-1 and 4.19.6-1 LTS kernels. I'm very new to manjaro and would appreciate any advise.



Some people have been having problems with a new version of systemd see Known issues and solutions in this thread:

Try the downgrade from a TTY-terminal -details in the same post.

Hi Keith, Thanks for the fast reply. I'll give it a try for sure.


No freezing so far, thanks for your help.

...and then it froze again. I checked that 239.6-2 Systemd running.

I'm not great at troubleshooting any other tips?

Thanks in advance for any help!

Provide more details of your system and hopefully someone with more expertise will be able to help you.
See here for instructions

Random freezing is usually because of hardware failure or limitations (disk space etc).
If your current session was not "frozen", you may check the previous boot errors, Xorg and xsession-errors

journalctl -p3
cat /var/log/Xorg.0.log.old
cat ~/.xsession-errors.old

For current session/boot , remove .old from the last 2 commands.

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Thanks for the help! I'm working 12 hour night shifts for the next few day and won't be able to update the thread, but I will take your advise and post back ASAP.


Thanks to everyone for the support. Here is my info:

  Host: brent-990 Kernel: 4.14.85-1-MANJARO x86_64 bits: 64 compiler: gcc 
  v: 8.2.1 Desktop: N/A wm: xfwm4 dm: LightDM 1.28.0 Distro: Manjaro Linux 
  Type: Desktop System: Dell product: OptiPlex 990 v: 01 serial: <filter> 
  Chassis: type: 6 serial: <filter> 
  Mobo: Dell model: 06D7TR v: A00 serial: <filter> BIOS: Dell v: A06 
  date: 07/25/2011 
  Topology: Quad Core model: Intel Core i7-2600 bits: 64 type: MT MCP 
  arch: Sandy Bridge rev: 7 L2 cache: 8192 KiB 
  flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 54298 
  Speed: 2890 MHz min/max: 1600/3800 MHz Core speeds (MHz): 1: 2393 2: 2225 
  3: 2200 4: 2201 5: 2218 6: 2495 7: 2389 8: 2215 
  Device-1: NVIDIA G72 [GeForce 7200 GS / 7300 SE] vendor: 
  driver: nouveau v: kernel bus ID: 01:00.0 chip ID: 10de:01d3 
  Display: x11 server: 1.20.3 driver: nouveau unloaded: modesetting 
  alternate: fbdev,nv,vesa resolution: <xdpyinfo missing> 
  OpenGL: renderer: NV46 v: 2.1 Mesa 18.2.6 direct render: Yes 
  Device-1: Intel 6 Series/C200 Series Family High Definition Audio 
  vendor: Dell driver: snd_hda_intel v: kernel bus ID: 00:1b.0 
  chip ID: 8086:1c20 
  Sound Server: ALSA v: k4.14.85-1-MANJARO 
  Device-1: Intel 82579LM Gigabit Network vendor: Dell driver: e1000e 
  v: 3.2.6-k port: 3040 bus ID: 00:19.0 chip ID: 8086:1502 
  IF: eno1 state: up speed: 1000 Mbps duplex: full mac: <filter> 
  IF-ID-1: tun0 state: unknown speed: 10 Mbps duplex: full mac: N/A 
  Local Storage: total: 4.15 TiB used: 1.44 TiB (34.8%) 
  ID-1: /dev/sda model: C6388 size: 59.63 GiB speed: 6.0 Gb/s 
  serial: <filter> rev: 6B scheme: MBR 
  ID-2: /dev/sdb vendor: Western Digital model: WD30PURX-64P6ZY0 
  size: 2.73 TiB speed: 6.0 Gb/s rotation: 5400 rpm serial: <filter> 
  rev: 0A80 scheme: GPT 
  ID-3: /dev/sdc type: USB vendor: Toshiba model: External USB 3.0 
  size: 1.36 TiB serial: <filter> rev: 0001 scheme: MBR 
  ID-1: / size: 49.77 GiB used: 9.65 GiB (19.4%) fs: ext4 dev: /dev/sda1 
  ID-2: swap-1 size: 8.80 GiB used: 344.5 MiB (3.8%) fs: swap dev: /dev/sda2 
  System Temperatures: cpu: 37.0 C mobo: N/A gpu: nouveau temp: 73 C 
  Fan Speeds (RPM): N/A 
  Processes: 200 Uptime: 4d 16h 52m Memory: 7.75 GiB used: 1.18 GiB (15.2%) 
  Init: systemd v: 239 Compilers: gcc: 8.2.1 Shell: bash v: 4.4.23 
  running in: xfce4-terminal inxi: 3.0.28

FYI, next time post the info in the formating brackets use the symbol in the reply box that looks like this </> and paste the info. Anyway, your temps don't look like they would be causing the issue, the gpu might be a little on the high side take a look at the gpu and see if you have a ton of dust in the fan. At the age of the machine this might a good time to apply some new thermal paste on the gpu heat sink.

Do you know what kind of power supply you have? Stock OEM?
Also do you have lm_sensors installed? If not install it and do a sudo sensors-detect and then sudo sensors following that post the results of sudo sensors .

You can also install stress-ng and do a stress test to see where the temps climb. I am thinking this either a temperature under load issues, or possibly a voltage issue on your power supply. If it is the original OEM power supply at 5 years on a desktop this is a more probable cause.

Lastly it coul dbe the nouveau drivers, have you tried switching your graphics drivers?

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I just bought the system, no HDD as a cheap upgrade to what I had. I plan to upgrade the power supply and graphics card after the holidays. I never considered new thermal paste, probably a good idea.

This is the sensor output

Adapter: ISA adapter
Package id 0:  +30.0°C  (high = +80.0°C, crit = +98.0°C)
Core 0:        +27.0°C  (high = +80.0°C, crit = +98.0°C)
Core 1:        +28.0°C  (high = +80.0°C, crit = +98.0°C)
Core 2:        +23.0°C  (high = +80.0°C, crit = +98.0°C)
Core 3:        +29.0°C  (high = +80.0°C, crit = +98.0°C)

Adapter: PCI adapter
temp1:        +69.0°C  (high = +95.0°C, hyst =  +3.0°C)
                       (crit = +130.0°C, hyst =  +2.0°C)
                       (emerg = +135.0°C, hyst =  +5.0°C)

Thanks for all the help!

I was hopeful that your board had sensors that would provide voltage readings. Unfortunately that does not appear to be the case. Fresh thermal paste is always a good idea with a machine new to you. I would definitely try switching your drivers from free to non-free/proprietary and see if that helps. Also try doing a memtest on your RAM you could have a bad stick, but in my experience things like this are usually due to voltage issues. Voltage issues are usually a result of a power supply with an attitude (i.e. a problem), or your utility company providing somewhat dirty power (i.e. the voltage to your house varies too much). You can either test the power supply if you have a good multi-tester, replace it, or in the case of dirty power get a UPS with automatic voltage regulation.

I'm shopping a seasonic 620w psu right now. I need to make sure any ATX power supply will fit in the Dell MT case. I'll switch the driver on my next day off, I'll have some reading to do. New thermal paste is also on the way. I appreciate your advise.


No problem. I love troubleshooting. Let us know how things go.

I've never done a BIOS Update, but am willing to give it a shot. I've downloaded the .exe, looks like I need to throw it on a bootable usb. Will unetbootin do that?


I just used rufus and freeDOS to make a bootable USB, then copied over the executable. I'm at work now, will have to update later. Thanks again!


BIOS update is complete. Next up, Video Driver.


Freezing is ongoing, 3 times this morning trying to read email. I think I'm going to drop in a PSU from a old Precision T3400 I have laying around, to see if it makes an improvement.


So, the latest update is I replaced the thermal paste on the CPU. I'm very hopeful this was the issue, it was dry hard and crusty. Definitely needed replaced. I also ordered a new SeaSonic M12II 520 Bronze EVO Edition 520W. We'll see how it goes from here.

Outstanding support from the community, Happy Holidays!


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