dmesg (for "display message" or "driver message" ) print or control the kernel ring buffer

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Why does Ubuntu 15.10 take so long to boot?

dmesg [ 65.639990] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 79.261370] Bluetooth: RFCOMM TTY layer initialized [ 79.261378] Bluetooth: RFCOMM socket layer initialized ...
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190 views

16.04: Slow boot no matter what I remove or do (Files for analysis provided)

I'm very frustrated with now long it takes my laptop to boot since I installed Ubuntu. Prior to Ubuntu, I had Kubuntu 16.04 which booted from Grub to desktop in less than 20 seconds. I switched to ...
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41 views

DVD drive keeps ejecting

my dvd-drive keeps ejecting. Laptop: Lenovo T420 OS: Ubuntu 16.04 (Gnome) Additional info: $ dmesg | tail [ 3638.453355] Buffer I/O error on dev sr0, logical block 91410, async page read [ 3638....
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28 views

Reduce Ubuntu boot time using dmesg

Can someone who understands this dmesginfo better then me explain some of what it is telling me and and what I need to do to reduce my boot time. http://pastebin.com/HxpdgJVR
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This means an external-HDD of mine is dead, right?

When I plugged in this external-HDD to see what's on it and/or why I'm no longer using it, I received this message when I used the ls command (see below). I forget entirely why it was not hooked up, ...
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I have a long boot-up time in Ubuntu 16.04. I have following errors as shown by dmesg :

[ 6.704903] EXT4-fs (sda7): re-mounted. Opts: (null) . . [ 21.390542] Bluetooth: hci0 command 0x1003 tx timeout [ 22.791752] vgaarb: this pci device is not a vga device [ 22.817189] ACPI ...
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3k views

Really slow boot on 16.04

I am trying to understand what I need to do to speed up my boot with Ubuntu 16.04. I have run dmesg and saved the output here. It all seems to go wrong after about 10 secs in. Most appreciated if ...
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1answer
69 views

My normal user file system only works in read-only mode and i don't have the password for the root user

I have Ubuntu Server V14.10.the administration of this system disappears with a former employee. I do not have the root password and apparently the file system for the user that I use is protected and ...
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Ubuntu 14.04 stuck in black screen for a minute before booting. According to dmesg, mounting swap partition is delaying the boot process

Ubuntu is taking at least a minute to boot. I checked the dmesg output and it seems that mounting swap takes a long time. I can't seem to figure out why this is happening? Dmesg output is as follows:...
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Making sense of Time in dmesg

I know the time in dmesg is the time since boot. But my specific question is this time is calculated at the start or end of the process mentioned in the line? Why this is important? take this example:...
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35 views

Slow boot: [drm] probing gen 2 caps for device 8086:151 = 261ac83/e

I am using Ubuntu 15.10. I checked dmesg and noticed a 30 second gap in the this part: [ 40.947102] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready [ 76.560493] [drm] probing gen 2 caps for ...
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168 views

Long Boot Time, sanitized_helper at fault (dmesg)

I have a desktop that has a 4.5 Ghz 6-core processor, 16GB or RAM, and an SSD. It is dual-boot between Windows 10 and Ubuntu 14.04. It boot Windows 10 in ~8 to 10 seconds, while it takes Ubuntu over 3....
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Ubuntu 14.04 Boots real slow

I have a Ubuntu 14.04 running on Intel® Core™ i5-4200U CPU @ 1.60GHz × 4 System boot takes a really long time. (1:40 seconds) as seen from bootchart. Attached, is my bootchart generated png which ...
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1answer
146 views

Fail message during boot. Can I delay boot or how do I solve it?

I have a red boot message with error during boot, but I cant figure out what is it. I can see it says FAIL and thats all, It boots too fast ;) I have tried to look in syslog and dmesg | grep fail/...
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48 views

Long Ubuntu 14.04 boot

The boot time in my Ubuntu is very long, its actually taking more than one minute, when Windows booting in 20 seconds. Reinstalling Ubuntu doesn`t help me. I have Asus K52F notebook: Intel Core i3 ...
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30 views

15.10 xubuntu slow boot gap 21-103 sec

My desktop is starting up quit slow, it hangs for a while. I used dmesg wich showed a big gap in the boot process from 21 to 103 sec http://pastebin.com/7dXhqQ0z [ 21.751243] audit: type=1400 ...
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1answer
81 views

is it possible to recover bad blocks?

I have a 500Gb Internal HDD and from dmesg's output i got this "wonderful" news: [ 324.434832] end_request: I/O error, dev sde, sector 4715026720 [ 324.434838] Buffer I/O error on device sde1, ...
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1answer
84 views

why dmesg output to log file is not working?

I am trying to output the dmesg to a log file so I can look at it through my txt editor, but i keep getting an error msg: dmesg > /Desktop/log.txt gives me this error: bash: /Desktop/dmesg.log: No ...
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15 views

Hardware Failure or maybe ata driver issue?

My 14.04 system has an older WDC WD1600 ATA hard drive. I frequently see ata errors but the system seems to run just fine - not sure if it just retries and works or what. This is a link to a very ...
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30 views

Xubuntu idles for a minute on boot

My Xubuntu 15.10 boots up very slowly on my SSD laptop. It has been running fine for a year, but it started to hang for about 60-80 seconds doing nothing during boot. I'm running kernel 4.2.0-21-...
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137 views

Slow Boot in Ubuntu 15.10 on Lenovo Y500

I am experiencing extremely slow boot times on my Ubuntu 15.10. It is a clean install over what used to be Windows 8.1 (with uefi). Startup ranges from a minute to a minute and a half, with about ...
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59 views

Restore boot parameters to default value

It feels like my system is getting slower and slower. I am using Ubuntu and my machine is an HP ProBook 450 i7 4x2.0GHz, 8GB RAM and an ordinary HDD. Still it takes ~2 minutes to boot, which in my ...
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BAR 0: error updating - when booting up

this is a output from my dmesg http://jpst.it/DSJC There is buch on things going on I was reading it my two things are highlited in red: [ 0.323969] pci 0000:05:01.0: BAR 0: error updating (...
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209 views

Ubuntu no longer detects SD cards

My card reader used to work fine but now it doesn't work, Here is my dmesg output: [ 290.581992] rtsx_usb_sdmmc rtsx_usb_sdmmc.0.auto: card claims to support voltages below defined range [ 292....
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68 views

Error message during booting up Ubuntu 14.04 LTS

I got the following error message on booting up. systemd-udevd[368]: '/usr/sbin/alsactl -E HOME=/var/run/alsa restore 0' [672] terminated by signal 81 (Unknown signal 81) What does it mean and how ...
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268 views

Much more verbose /var/log/*

I remember the times when probably literally every log message was being put into /var/log/messages and /var/log/syslog. It was year 2000 if someone's curious. Now it is different. Log files are ...
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104 views

dmesg log messages meaning

I need to understand the meaning of the following messages I get when I run dmesg in order to investigate why a certain AP is having problems connecting specifically with my laptop. Here are the ...
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233 views

Strange errors in 'dmesg' output related to mounted partition

There are some strange errors showing up in my dmesg output related to mounting sda4 on boot, which is an extended partition containing used logical volumes. The following is an extract of my dmesg ...
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175 views

What does wq_busy=1 indicate in a failure to suspend?

After upgrade to 15.10, my laptop no longer suspends. dmesg says […] PM: Syncing filesystems ... done. […] PM: Preparing system for sleep (mem) […] Freezing user space processes ... (elapsed 0.001 ...
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Is it safe to use Ubuntu when this error is presented? (mismatch in ips_enabled (expected 1, found 0))

Is it safe to use Ubuntu when this error is presented in "dmesg"? Everything is working just fine (after I have disabled processor microcode firmware). [ 712.259824] [drm:intel_pipe_config_compare ...
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38 views

Need explaination of dmesg(Ubuntu Server)

I just set up an old machine I have as an Ubuntu server. When it was booting a huge dmesg came up, and I am not sure what to make of it. Here is the dmesg file: http://paste.ubuntu.com/12895065/ ...
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36 views

Slow Ubuntu 15.04 bootup (suppose realtek problem)

I couldn't find a solution for my problem with Google so I hope someone here can help me. I recently installed Ubuntu 15.04 on my PC beside W8.1 (here's my specs : q6600 (core duo quad - 4 cores @2.4 ...
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138 views

How to fix modprobe?

I followed some instructions, like a typical noob, in trying to assign a tty/USB0 to my la crosse technology USB device. Instead, I guess I was installing a modprobe for an "ipaq" (I thought it was a ...
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1answer
196 views

Error using usb flashdrive - what usb error codes mean?

I have somewhat arbitrary errors when using a pendrive, as reported by dmesg: [ 306.904222] usb 2-3: new high-speed USB device number 7 using ehci-pci [ 321.080172] usb 2-3: string descriptor 0 ...
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1answer
143 views

How to detect & configure a upnp USB to serial adaptor for RXTX development in Java

I ordered a TRENDnet TU-S9 and and plugged it into my system. I heard this is plug and play and that it works on Ubuntu. I'm wondering how to determine which port identifier this USB to serial adapter ...
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319 views

PCIe error in dmesg log

I checked the dmesg logs today, and I found this: [108957.958768] pcieport 0000:00:03.0: AER: Multiple Corrected error received: id=0018 [108957.958797] pcieport 0000:00:03.0: PCIe Bus Error: ...
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1k views

What to do with `usb 3-1: Device not responding to set address`?

I found it in dmesg of my Ubuntu 14.4.02 notebook. I wonder if should take actions. ~ > grep "usb 3" dmesg [ 2.475970] usb 3-1: new low-speed USB device number 2 using xhci_hcd [ 2.476450] ...
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1answer
260 views

How do I use dmesg to diagnose slow boot speed?

I've installed Ubuntu 15.04 on a new Lenovo Thinkpad S440. With 8 gig of RAM, an i7 and an SSD I expected Ubuntu to boot in a few seconds, instead it seems to be taking almost a minute. I've read a ...
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612 views

Ubuntu taking long to shutdown [duplicate]

I use Ubuntu 15.04, I have a SSD drive also. Very recently onwards the ubuntu is taking long to shut down nearly 1:30 minutes. I checked the shutdown log messages and I get the follow message. A ...
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1answer
6k views

What does perf interupt mean?

I am working on my computer, trying to write some device code. I checked into dmesg to get some info, and saw this: perf interrupt took too long (2507 > 2500), lowering kernel....
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2answers
442 views

dmesg full of problems after startup

This morning, my Ubuntu 14.04 installation booted to terminal rather than Gnome shell. startx got me in, but without sound (hardware not shown), and on a reboot instead tried sudo start gdm which got ...
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858 views

Error message on booting up Ubuntu 14.04.2 [duplicate]

After upgrading from kernel linux-image-3.13.0-49-generic to linux- image-3.13.0-51-generic, I am getting this error message in dmesg on startup: [ 6.352555] mei_me 0000:00:16.0: irq 47 for MSI/MSI-X ...
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376 views

Help me. my boot time is more than 20s

i have a hp pavilion laptop with 2gb ram, intel i3 and 500gb hdd boot time is taking too long(>20s). tried preload, e4rat, e4defrag etc but still no improvement below is my dmesg output -------------...
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276 views

Problem about detecting and mounting devices

The device I want to mount is Nokia 130. lsusb or lsblk cannot find it, but dmesg will, some part of the output is following: [30415.272150] usb 3-2: new full-speed USB device number 4 using xhci_hcd ...
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1answer
109 views

On startup, where does the output to dmesg get logged?

On startup, where does the output to dmesg get logged? Doesn't say on the man page: http://manpages.ubuntu.com/manpages/trusty/man1/dmesg.1.html
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1answer
1k views

Cannot mount or recognize usb flash drive ubuntu 14.04

I am having trouble mounting my 16GB usb3.0 flash drive both on windows 7 and ubuntu 14.04. Device doesn't show on fdisk or when I run lsusb. This is what I get when I run dmesg after pluging it in....
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230 views

radeon dpm: why my power state 0 has high values which are not aligned with dmesg?

# cat /sys/kernel/debug/dri/64/radeon_pm_info uvd vclk: 0 dclk: 0 power level 0 sclk: 37500 mclk: 150000 vddc: 950 vddci: 875 pcie gen: 3 # cat /sys/class/drm/card0/device/power_dpm_state ...
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1answer
37 views

Why am I getting “trusty” in a path while running ubuntu 12.04?

I'm running ubuntu 12.04 and on a different partition there is a ubuntu 14.04 distribution. When running dmesg one entry is the following: [ 3161.519138] WARNING: CPU: 1 PID: 4782 at /build/...
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1answer
468 views

What is taking up 320 seconds on my bootup?

Hi I've run a dmesg after booting with a kernel with loglevel=7. [ 19.439254] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88080e62f248 [ 19.439255] xhci_hcd 0000:...
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533 views

My USB Keyboard isn't working

I have just installed Ubuntu and now my USB keyboard and mouse are not working. I plugged in a PS/2 keyboard so i can now execute commands. I get a lot of strange messages in dmesg: http://paste....