How to provide good information in your posts

When asking questions in the forum, it would be most helpful to all members if you provide some basic information.

When you provide info from the terminal, usually from your logs, you have to format it so the content is easy to read.
First copy and paste your text/terminal/code into the post
Then select the text/code and click the post edit toolbar button </> .
Another handy way is to use 3 backticks ` at the start and 3 more at the end of the text like this:

```

Paste text or code here

```

Please open a terminal and type the commands as below. (Do Not type the $)

First no matter what the problem, provide the hardware and software with inxi -Fxxxza --no-host

$ inxi -Fxxxza --no-host

System:    Kernel: 5.2.11-1-MANJARO x86_64 bits: 64 compiler: gcc v: 9.1.0 
           parameters: BOOT_IMAGE=/boot/vmlinuz-5.2-x86_64 root=UUID=57534c87-8a87-45d6-951c-8d5a118e4fe6 rw loglevel=3 quiet 
           resume=UUID=57534c87-8a87-45d6-951c-8d5a118e4fe6 resume_offset=34816 
           Desktop: KDE Plasma 5.16.4 tk: Qt 5.13.0 info: latte-dock wm: kwin_x11 dm: LightDM 1.30.0, SDDM 
           Distro: Manjaro Linux 
Machine:   Type: Desktop Mobo: ASUSTeK model: P7H55-M v: Rev X.0x serial: <filter> BIOS: American Megatrends v: 1101 
           date: 08/18/2010 
CPU:       Topology: Dual Core model: Intel Core i3 560 bits: 64 type: MT MCP arch: Nehalem family: 6 model-id: 25 (37) 
           stepping: 5 microcode: 7 L2 cache: 4096 KiB 
           flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 26770 
           Speed: 3211 MHz min/max: 1200/3333 MHz Core speeds (MHz): 1: 2804 2: 3206 3: 3168 4: 2893 
           Vulnerabilities: Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable 
           Type: mds status: Vulnerable: Clear CPU buffers attempted, no microcode; SMT vulnerable 
           Type: meltdown mitigation: PTI 
           Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via prctl and seccomp 
           Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization 
           Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW, STIBP: conditional, RSB filling 
Graphics:  Device-1: Intel Core Processor Integrated Graphics vendor: ASUSTeK driver: i915 v: kernel bus ID: 00:02.0 
           chip ID: 8086:0042 
           Device-2: NVIDIA GF116 [GeForce GTX 550 Ti] vendor: eVga.com. driver: nvidia v: 390.129 bus ID: 01:00.0 
           chip ID: 10de:1244 
           Display: x11 server: X.Org 1.20.5 driver: modesetting,nvidia alternate: fbdev,intel,nouveau,nv,vesa 
           compositor: kwin_x11 resolution: 1920x1080~60Hz, 1920x1080~60Hz 
           OpenGL: renderer: GeForce GTX 550 Ti/PCIe/SSE2 v: 4.6.0 NVIDIA 390.129 direct render: Yes 
Audio:     Device-1: Intel 5 Series/3400 Series High Definition Audio vendor: ASUSTeK driver: snd_hda_intel v: kernel 
           bus ID: 00:1b.0 chip ID: 8086:3b56 
           Device-2: NVIDIA GF116 High Definition Audio vendor: eVga.com. driver: snd_hda_intel v: kernel bus ID: 01:00.1 
           chip ID: 10de:0bee 
           Device-3: Logitech Webcam C250 type: USB driver: snd-usb-audio,uvcvideo bus ID: 3-1.3:3 chip ID: 046d:0804 
           serial: <filter> 
           Sound Server: ALSA v: k5.2.11-1-MANJARO 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: ASUSTeK P8P67 and other motherboards 
           driver: r8169 v: kernel port: d800 bus ID: 02:00.0 chip ID: 10ec:8168 
           IF: enp2s0 state: down mac: <filter> 
           Device-2: Sagem XG-76NA 802.11bg type: USB driver: zd1211rw bus ID: 1-1.6.2:4 chip ID: 079b:0062 
           IF: wlp0s26u1u6u2 state: up mac: <filter> 
Drives:    Local Storage: total: 6.89 TiB used: 93.77 GiB (1.3%) 
           ID-1: /dev/sda type: USB vendor: Seagate model: Expansion Desk size: 4.55 TiB block size: physical: 4096 B 
           logical: 512 B serial: <filter> rev: 9401 scheme: GPT 
           ID-2: /dev/sdb vendor: Seagate model: ST3320613AS size: 298.09 GiB block size: physical: 512 B logical: 512 B 
           speed: 3.0 Gb/s rotation: 7200 rpm serial: <filter> rev: SD22 scheme: MBR 
           ID-3: /dev/sdc type: USB vendor: Hitachi model: HDS723020BLA642 size: 1.82 TiB block size: physical: 512 B 
           logical: 512 B rotation: 7200 rpm serial: <filter> scheme: MBR 
           ID-4: /dev/sdd vendor: Samsung model: SSD 850 EVO 250GB size: 232.89 GiB block size: physical: 512 B logical: 512 B 
           speed: 3.0 Gb/s serial: <filter> rev: 2B6Q scheme: MBR 
RAID:      Hardware-1: VIA VT6421 IDE/SATA Controller driver: sata_via v: 2.6 port: e000 bus ID: 05:01.0 chip ID: 1106.3249 
           rev: 50 
Partition: ID-1: / raw size: 29.30 GiB size: 28.71 GiB (98.00%) used: 22.73 GiB (79.2%) fs: ext4 block size: 4096 B 
           dev: /dev/sdd2 
           ID-2: /home raw size: 144.99 GiB size: 141.72 GiB (97.74%) used: 71.04 GiB (50.1%) fs: ext4 block size: 4096 B 
           dev: /dev/sdd5 
Sensors:   System Temperatures: cpu: 62.0 C mobo: N/A gpu: nvidia temp: 71 C 
           Fan Speeds (RPM): N/A gpu: nvidia fan: 42% 
Info:      Processes: 226 Uptime: 44m Memory: 7.58 GiB used: 2.48 GiB (32.6%) Init: systemd v: 242 Compilers: gcc: 9.1.0 
           Shell: bash v: 5.0.9 running in: yakuake inxi: 3.0.36 

Two basic commands used to find errors

$ dmesg

This command is used to get hardware boot stopping errors and some other things.

$ journalctl

This command is used for all kinds of errors and for trouble shooting.

Non-booting sort of errors , this means the user never gets to a login prompt or a prompt of any kind.
** If this is not your situation then skip this and start with Trouble Shooting below. **

If you end up in a non boot situation you still need to get to a command prompt and do some trouble shooting.
Here are three things to try.

  1. First try to get to another TTY (command terminal) with the key combination. CTLALT+F2. You can try any of several combinations from F1 to F6. If you get a login prompt then good for you and you can start to troubleshoot your situation, login with your user name and password.

  2. You can also use the Grub prompt to try to get to a TTY, see my General Notes at the bottom.

  3. If the above does not work then >> Using the chroot method.
    For this method, You can use chroot from a live Manjaro usb stick.
    Boot Manjaro with live usb and then open a terminal and type
    manjaro-chroot -a

You have just logged into your Manjaro install and can now change or repair anything within your Manjaro system.

With all of these methods of logging in you are now in control of your Manjaro install.
You can now copy or look at logs as they exist on your normal Manjaro system and do other rescue type things.

Trouble Shooting and finding Errors comands

First dmesg

$ dmesg will show any hardware problems and should be run first, look for the words Error, Failed or sometimes even different color lines. Look the whole thing over to get a sense of how it works, basically all your hardware gets checked by the linux kernel from most primitive like your CPU (important) to other things like your sound card etc...
To make dmesg more convenient use
$ dmesg | less
and then the arrow keys to move up and down (if you are chroot in GUI you do not need this).
To get hardware info use some of these examples:

$ dmesg | grep sd

get info on sata drives

$ dmesg | grep usb

get info on usb devices

$ dmesg | grep eth

I think you get the idea.

This one is not tested >>> $ dmesg | grep -E '\b(wl|e(th|n([osp]?[0-9]|x)))\w+'

Now journalctl.

$ journalctl will show all kinds of stuff as documented here Link
The most useful in a no boot situation is the previous boot or current boot so use the command as below.
$ journalctl -p3 -b -1
the numbers in the command are important as you have read on the linked wiki :wink:.
p3 picks up all non-critical errors from the boot probably not what we want in a non-boot, so use p2 and then p1 and finally p0 is used to pick up emergency errors like a kernel dump.
-b -1 conveys the boot log that is being searched, in this case the boot previous to our current boot.
So to get critical boot errors from current boot use
$ journalctl -p2 -b -0

It may also be important to look at the xserver logs in a non-booting situation (not on Wayland). Use the cat command to have a look just enter (cat /var/log/Xorg.0.log). Do not include "> the current session" in your commands.
$ cat /var/log/Xorg.0.log > the current session
$ cat /var/log/Xorg.0.log.old > or the previous successful session
$ cat /var/log/Xorg.1.log > after the last suspend

No GUI errors , this means the boot completes but you are left with a non-starting desktop environment sometimes with just a mouse cursor. In these situations you are already booted but the GUI is not working and you can almost always use CTLALT+F2 to get to a prompt.
You can use almost the same commands as above to track down the problems.
With journalctl just look for errors with $ journalctl -p3

What to do with the error you find?

Now that you have this information post the critical things using the code tags in the forum software depicted with the </> symbol in the post editor toolbar.

General Notes

Booting to command prompt from Grub

At Manjaro Grub menu use the keyboard to hit E to edit the kernel boot line.
In the grub editor look for the line beginning with linux, it should look like this.
linux /boot/vmlinuz-4.11-x86_64 root=UUID=0a01099a-1e33-489a-a2de-10104e8492f5 rw quiet
Go to the end of the line and backspace (delete) the word quiet and add systemd.unit=multi-user.target like below.
linux /boot/vmlinuz-4.11-x86_64 root=UUID=0a01099a-1e33-489a-a2de-10104e8492f5 rw systemd.unit=multi-user.target
Or you can also just add "3" in place of the "systemd.unit=multi-user.target"

Now boot the system with F10 key
You should be offered to login. Login with your user account.
At this point you should have a working system with an Internet connection.

Find Sleep errors in journalctl
journalctl -b0 | grep Suspend
journalctl -b0 | grep Resume

Follow journalctl live
journalctl -f
The above command is really pretty useful so lets use it. For example, open a terminal and type the command and then plug in a usb device or close and then open the lid on your laptop, put your computer to sleep etc... You should see what the linux kernel and the desktop thinks about your actions and what may be wrong or happening right. :grinning:
Very useful.

If you get recurring errors follow these steps to get a clean log with the problems.

Clean the log and paste errors
Please make sure your system is up to date with the command,
sudo pacman -Syyu
Then clean your journalctl with
sudo journalctl --vacuum-time=1d
and then after that the command
sudo journalctl --vacuum-size=250M
Now log out and log back in. Do not skip this step.
Then wait for the problem and look at the errors with,
journalctl -p3

You may find you can google the errors and get an idea of what is going on or report the errors as described above.

Please PM anika200 before making edits to this post beyond more than a couple words or corrections , Thank you.
If you do not get a reply in 365 days then go for it.

Here is the list of people that have broken the above wishes so far.
@freggel.doe
@AgentS
@DeMus

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Wi-Fi connection effectively unusable at 100% signal strength
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problem after the settings
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New to the forum, introduce yourself
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Desktop won't load after boot
Speakers not auto-muting when headphones in
Backlight config
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Great post. One thing which could/should be added is this:
when using a terminal make it wide so lines which are output from the instructions will not be chopped and therefore will be easier to read.

1 Like

So useful, thanks!
I never heard of gist before

1 Like

Me either, :laughing: I have to check it out too. I think @AgentS made that suggestion. :relaxed:

2 Likes

gist or http://sprunge.us (no login, no package)

cat /var/log/Xorg.0.log |curl -F 'sprunge=<-' http://sprunge.us
1 Like

Server down?

$ cat /var/log/Xorg.0.log | curl -F 'sprunge=<-' http://sprunge.us
<html>
 <head>
  <title>500 Internal Server Error</title>
 </head>
 <body>
  <h1>500 Internal Server Error</h1>
  The server has either erred or is incapable of performing the requested operation.<br /><br />



 </body>
</html>
1 Like

oops :nauseated_face:

now use http://ix.io

1 Like

and wgetpaste is nice. I 'll add them when available, or you can do it. :wink:

1 Like

Moar likes for @anika200!

1 Like

hahaha, yes more likes. :joy:

For some reason they were all wiped out, sob sob sniffles.

I do enjoy the likes though, thanks all. Hopefully it helps someone besides me though :laughing:

2 Likes

I suspect they reached an integer overflow.

Of course it was :grin:

This is great. Is there some way to pin this to the top of the forum? Most posts these days are requests for troubleshooting.

Ones I also tend to use for troubleshooting

lsusb -v |grep blue
If I can’t find the Bluetooth card, I tell them to post lsusb -v
(For people with Bluetooth issues)

If you would like, add that everyone should mark their issue as :white_check_mark: solved if someone’s issue is resolved.

2 Likes

Great suggestion in general and about the solved button, I will work it in sometime. A list of more commands somewhere might be helpful, I will see what I can do. Maybe someone else already has one I could link too?

I have also started using hwinfo --bluetooth or hwinfo --gfxcard, which even works within vm if need be. See hwinfo --help for the list of options.

1 Like

Wow! I didn’t even know about hwinfo. A lot easier to use than lsusb -v |grep blue

1 Like

Try this hwinfo command I dreamed up if you want information about all your network components:

hwinfo --netcard --wlan --bluetooth | grep -Ei "model\:|driver\:|status\:|cmd\:|file\:|detected\:" | grep -v "Config Status" 
4 Likes

Ooh, I like that! Great helper for your “area of expertise.”

No, not that one. The other one. :wink:

1 Like

Alright I admit it looks cool :sunglasses: but does’nt hwinfo --network do the same thing? I think it would work for regular trouble shooting anyway but maybe not for total infiltration.

Yes, hwinfo does exactly the same thing. but it outputs too much information that is not essential for troubleshooting. It also outputs sensitive information that really shouldn’t be posted on a public forum. That is why I removed all the non-essential and sensitive information from the command output. The full hwifo output is not really what you want posted on a troubleshooting thread, best to be selective for those purposes I think.

1 Like

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