Unix and Linux Stack Exchange
Unix and Linux Stack Exchange

Questions tagged [hot-plug]

The process of replacing or adding components without stopping or shutting down a computer system.

52 questions
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6 answers

How can I safely remove a SATA disk from a running system?

I sometimes need to plug a disk into a disk bay. At other times, I have the very weird setup of connecting a SSD using a SATA-eSATA cable on my laptop while pulling power from a desktop. How can I safely remove the SATA disk from the system? This…
Lekensteyn
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2 answers

What happens when a USB drive is plugged in?

What is the flow of USB events from kernel space to user space? I get a popup on my desktop when I plug in a USB drive -- what is the sequence of events that leads from detecting the new USB drive to mounting it and showing that popup?
Navaneeth Sen
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13
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2 answers

Prevent keyboard layout reset when USB keyboard is plugged in

Whenever I plug in a USB keyboard, the layout of all keyboards is reset to some system default (a US layout which doesn't have modifiers and other keys the way I want them). I've observed this on many Debian and Ubuntu systems, including Ubuntu…
Gilles 'SO- stop being evil'
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9
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5 answers

Find when new hardware is connected on FreeBSD

How can I find out when a device is connected to my FreeBSD machine? Lets say I plug in a USB device, HDMI device, Bluetooth or something like that. Can I have a console output to say [device] and gives some output about the device?
user1610950
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9
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4 answers

How can I switch to my USB headset automagically when it's plugged in?

I'm running Funtoo Linux, a Gentoo derivative. My two new Plantronics USB headsets (one wired, one wireless) work nicely. I plug one in, ALSA notices it, and if I manually set an application to use it instead of the default devices, it will. I'd…
HedgeMage
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8
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2 answers

How to check if a drive supports hotswap?

Not all SATA drives support hot-swap. Especially older models do not seem to work correctly and require the system to be rebooted, despite the fact that the controller works well with newer drives. QUESTION: How do I check if a drive supports…
Konrad Gajewski
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7
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2 answers

VirtualBox guest: 16 CPUs detected but only 1 online

I am running VirtualBox (using the Qiime image http://qiime.org/install/virtual_box.html) The physical hardware is a 32 core machine. The virtual machine in VirtualBox has been given 16 cores. When booting I get: Ubuntu 10.04.1 LTS Linux…
Ole Tange
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7
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2 answers

On Linux, (how) can I "hot-unplug" memory?

This is what I've tried: sudo zsh -c 'echo offline >/sys/devices/system/memory/memory109/state'` and got the following error: zsh:echo:1: write error: device or resource busy Do I perhaps need to make sure that the memory module that I am about…
Wizek
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7
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2 answers

Is it possible to simulate/force/fake an USB device unplug and replug on Linux?

So I've got a strange problem that I've been running onto. I've got a bitcoin usb miner, Bitfury, and I'm using CGMiner to mine. When I start the application, as root, the USB device is not detected automatically. CGMiner only detects the stick when…
user63936
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1 answer

How to prevent kernel or any broadcast messages from flooding the TTYs?

Because of some hot-plugging issue, similar to what talked of here, the TTY displays show a continuous stream of messages (which are also logged in the /var/log directory). Every text I key in flows away visually, but it does take the inputs (I can…
rusty
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2 answers

Ethernet to USB adapter on Linux

I've recently bought an Ethernet to USB adapter. When I plug this into my computer running Linux (Ubuntu in my case) , this just works automatically, and I can see an internet connection over this interface without doing anything. What I want to…
Engineer999
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4
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1 answer

How to check if hot-swap or hot-plug are activated on my Linux machine

I have Ubuntu 12.04.1 LTS 64-bit on a PowerEdge 2900. My current setup has two 300GB disks (no RAID), but I want migrate the system to three new 600GB disks. I'm trying to connect the new disks, make a RAID5 array, and copy my partitions to the new…
rkmax
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4
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2 answers

dmesg: pci BAR 7: can't assign io

I have VMware virtual machine running Debian Wheezy. I have compiled my own kernel 3.14. I have noticed dmesg is flooded with messages pci BAR 7: can't assign io (size 0x1000). I have no idea what these messages mean. The VM seems to be running OK,…
Martin Vegter
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4
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0 answers

Keep keyboard layout upon inserting external keyboard

I have a custom keyboard layout, that I enable using this commands: setxkbmap -verbose us -variant altgr-intl xmodmap -verbose /home/coub/.myxmodmap This works just fine, the thing is, that when I attach an external keyboard, the attaching will…
ryskajakub
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0 answers

The proper way to turn off an external sata encolsure?

I have an e-sata external enclosure with a port expander and 4 sata disks in it that I use for periodic backups. I have what I think is a sound method for powering it off, but not sure if it is the best method. After unmounting the filesystem and…
casey
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