General questions about hardware under Linux/Unix. Use a more specific tag if applicable.

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11
votes
4answers
4k views

Detecting headphone connection/disconnection in Linux

I am trying to detect a signal when a headphone is connected or disconnected from the system. What is the best way to do this? If there is a special board with drivers, that will be my preferred ...
2
votes
2answers
1k views

How to determine bitness of hardware and OS?

Output of uname -a on my RHEL 5.4 machine is: Linux <machine name> 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux Does it mean that hardware is 64 bit ...
4
votes
5answers
757 views

What can I use that is small, has linux, an ethernet port, and a hard drive?

I see that David Braben has created a $25 USB stick that can run linux. Check out the website at http://www.raspberrypi.org/ That's not available yet - so what's a low power *nix device that I can ...
3
votes
2answers
740 views

Getting input from a USB device listed with lsusb

I have a CF-1KB barcode reader connected to an RS232 to PS/2 adaptor and a PS/2 to USB adaptor. I'm not sure how the device works so I'm trying to figure it out by looking at what information I'm ...
3
votes
2answers
214 views

Can lvm2 volumes based on device names like sda, sdb etc be mounted if their names change?

Lets say I would like to make a large volume from external usb drives. I create the lvm volume on drives that have been given certain device names sdf sdg or whatever and at some point they are ...
3
votes
2answers
123 views

Reference material about device management

Can anybody recommend materials about device management in the Linux environment? From the point where I insert a cdrom or usb device to the point where it is mounted in /media/somedir. I know that I ...
1
vote
2answers
145 views

Things to consider when buying a desktop to use dual screens in linux

I'm about to buy a new desktop. I would like to be able to use two monitors. I am not sure what features will be most important here. I will probably run Ubunbtu, although I haven't decided (I might ...
2
votes
1answer
121 views

Worrisome HD related messages after power outage

Had a power outage two weeks ago on my BSD server that my UPS decided then was a good time to fail. Just fired it up this evening only to have the following errors show during what I would assume is ...
2
votes
1answer
209 views

GRUB won't boot, live CDs either

First, my computer crashed slowly, as if all the files were being deleted, then when I tried to reboot, GRUB just didn't show up. I also tried to boot on a live CD but it doesn't work either (yes, ...
4
votes
2answers
1k views

Run Python Portio script as normal user without root access

I know there are risks running a root script as a normal user, but in this case I don't have a choice and what I am doing is machine related. I have an Small Board Computer that has GPIO ports and I ...
4
votes
1answer
168 views

TWAIN API support on FreeBSD

Does FreeBSD support in any way the TWAIN API? If not, what is the API that could be used to read data from imaging devices (webcams) - preferably in a portable way.
9
votes
4answers
833 views

How do I disable or change the caps lock key on my keyboard?

We have ergonomic keyboards at work which I'm not entirely used to. I seem to keep hitting the capslock key while I'm in vim and it's starting to annoy. How can I disable this key, and or change to to ...
3
votes
1answer
1k views

Linux compatible motherboard

Where can I find a list with Linux compatible motherboards. I want all features of the motherboard to work reasonably well with latest valilla Linux kernel (ie, clearly document that I need external ...
5
votes
4answers
4k views

My laptop cannot adjust brightness

I have a problem adjusting my laptop's brightness. This is a hardware problem but I can solve it with ccsm, but other programs do not work for me, e.g., xgamma, etc. Now I am running Fedora 15 and ...
1
vote
1answer
137 views

Set runlevel at boot via hardware (analog) input, switch, etc.?

I've got pretty solid Linux experience, but little in the embedded/small system area, and this one has me baffled. I've agreed to help a friend work on a project using a tiny little x86-compatible ...
3
votes
1answer
326 views

Pluggin a bunch of USB hard drives into a Linux system?

I've got a Linux system with two USB 2.0 ports and one USB 3.0 port, and I would like to know how many USB hard drives I could plug into it. On the performance side, what would the I/O access be like ...
4
votes
2answers
786 views

Are there any issues using 2TB hard drives with 4k sectors

I'm thinking of purchasing a 2TB hard drive (probably a Seagate F4), but I've read reports of Linux not being compatible with 4k sectors on these drives. Do I have to do anything specific when I ...
8
votes
2answers
6k views

How to check which GPU is active

I have 2 GPU's in my netbook. How do I know which one I'm actually using at any given moment?
1
vote
1answer
390 views

Debian Squeeze not booting anymore

My machine is not booting anymore. It is a debian squeeze server on amd64 with 4 hard disks and 2 software raids (md4 and md5). You can watch this video of the screen after switching it on. (The video ...
1
vote
1answer
147 views

First steps: installing a compatible Bluetooth card to my laptop? [closed]

I'm looking to install a Bluetooth card to my laptop, as it currently doesn't have Bluetooth support and I'd like to get away from having to use an external USB dongle. I own a Gateway NV51 series ...
4
votes
2answers
2k views

What determines whether an interrupt is IO-APIC-edge or IO-APIC-level?

Looking at the contents of /proc/interrupts on an x86 Linux, I see that some of the interrupts are IO-APIC-edge while others are IO-APIC-level. I wonder what determines the interrupt type, is it the ...
1
vote
0answers
242 views

Fedora 14 touchpad issue

I have an HP 3031-et series laptop. My hardware is: Intel i5 460M 3 GB DDR3 RAM Graphic Cards: ATI READON 5650 HD and Intel HD Graphic I installed Fedora 14 on my hardware, and after installation ...
1
vote
0answers
265 views

Fedora 14 graphics issue

I have an HP 3031-et series laptop. My hardware is: Intel i5 460M 3 GB DDR3 RAM Graphic Cards: ATI Radeon 5650 HD and Intel HD Graphics I installed Fedora 14 on my hardware, and after installation ...
5
votes
2answers
3k views

Slow down the CPU

I tried to slow down my CPU with powernowd and cpufreq-selector. I hoped that with lower frequency it will be less hot and I won't hear my fan every time I will run internet radio. I used the ...
2
votes
1answer
905 views

CentOS 5.6 x86 64 Not seeing all my memory

So I installed CentOS 5.6 on a box at my house and it is not recognizing all my memory. I have 2gb in the machine but when you run a 'free -m' or a 'top' or a 'cat /proc/meminfo' it only shows that ...
2
votes
2answers
1k views

Unique hardware signatures in BSD?

What unique hardware signatures can you get from, for example, a FreeBSD system? I am right now using the ethernet mac address (getifaddrs(3)) but as we all know this can easily be changed with ...
7
votes
2answers
693 views

Information about a laptop fan

Can you help me with finding all the hardware information (parameters) and configuration files about the fan in my laptop? I'm interested of the fan's parameters and configuration files that I can ...
14
votes
3answers
4k views

How to detect memory type under Linux?

Which Linux utility can tell me if I have registered or unbuffered ECC memory in my server? Lshw and dmidecode do not work for me; dmidecode provides no information about registered vs. unbuffered: ...
6
votes
3answers
972 views

Why does one linux distro run hotter than another on laptop?

I had been using Arch Linux 64 bit on a Gateway P6860FX for about two years, and recently switched to Ubuntu (also 64 bit). When I type on the keyboard, my left hand feels a lot more warmth than ...
2
votes
2answers
932 views

no network device found after Kernel update

So I managed to install Debian 5 on an eBox 3300MX (an embedded type computer). I added a custom kernel after getting a basic install done. That was to get the network card to work. After that, I ...
1
vote
0answers
109 views

How do I determine the make & model of my storage devices? [duplicate]

Possible Duplicate: How do I find out what hard disks are in the system? I'm running a CentOS 5.5 system. This system has 4 disks and a 3ware RAID controller. How can I determine the make ...
5
votes
3answers
217 views

How to check why the cdrom cannot be open exclusively

Sometimes when I try to burn an ISO image, the message that "/dev/sr0" cannot be open exclusively appears. lsof does not shows any program that opens "/dev/sr0" (I checked for aliases too).
1
vote
1answer
585 views

CCD cam to USB - AV grabber for linux

I was wondering if there is an AV Grabber that supports Linux. I have IC-348 model I.C.U (international camera unit) camera made in P.R.C, which uses a Sony CCD 420TVL. I want to grab the video output ...
18
votes
4answers
1k views

Why does Linux scale so well to different hardware platforms?

Why does Linux run well on so many different types of machines - desktops, laptops, servers, embedded devices, mobile phones, etc? Is it mainly because the system is open, so any part of it can be ...
5
votes
2answers
883 views

*nix working on eBox 3300

I'm not sure if hardware questions are alright here, I didn't see many. I am trying to install any Linux operating system on an eBox 3300. I am having trouble, and the only thing I have been able to ...
1
vote
1answer
539 views

Compatible Wireless Router? [closed]

I'm looking for a wireless router for personal use. I have a small apartment and need the router primarily for my android phone connection. I might need it for streaming video as well. I'm running ...
3
votes
1answer
72 views

Can driver installation procedures be made into a single package?

Here is an example of the instructions for installing a Brother printer: http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/instruction_prn3.html and this just a part of the procedure... ...
3
votes
3answers
532 views

How to retrieve monitors configuration from the command line?

I am making a script that needs to access the computer's monitor(s) configuration. How can I do that? Is there a command or a file I could read where I can access this information? At the moment, I ...
1
vote
7answers
1k views

What distro for an old HP (Celeron/384MB)

An old HP desktop just came my way for service. Was running XP, but the install is trashed. User would like to switch to Linux, but the box it's only a 950mhz Celeron with 384MB RAM. It does have a ...
1
vote
1answer
392 views

Linux: Interface/control 3.5 mm Headphone or Microphone port? [closed]

This might sound crazy, but bear with me ;) I am making a DIY camera trigger, and I would like to see if I can trigger it remotely by plugging it into my Microphone or Headphone ports. It's a basic ...
1
vote
1answer
2k views

simultaneously share /dev/videoX with multiple applications?

the goal is to use the same webcam for video chat apps and for home security at the same time. Currently, the webcam is working just fine with either VLC (or mjpg-streamer) and with Kopete - just not ...
63
votes
12answers
206k views

How do I find out what hard disks are in the system?

I need to know what hard disks are available, including ones that aren't mounted and possibly aren't formatted. I can't find them in dmesg or /var/log/messages (too much to scroll through). I'm hoping ...
2
votes
3answers
150 views

Linux advice for datalogging machine

I've been asked whats the cheapest/easiest/most reliable way to use Linux as a webserver/mysql DB machine. Is it going to be buying a really old PC and putting Linux on it or what i'd rather do is get ...
8
votes
3answers
6k views

How can I tell if my hard drive is PATA or SATA?

I have an ATA hard disk in my laptop, running Fedora 11, kernel 2.6.30.10-105.2.23.fc11.i586. I am looking to upgrade the disk in here (would love to get an SSD) but I forgot if it's a serial ATA or ...
9
votes
1answer
2k views

Hard disk labels

How do I add a label to a partition on a disk, and how do I then mount it by label (manually and via fstab)? note: this is an external hard drive
13
votes
1answer
6k views

How do you use badblocks?

I need to do a destructive (rw) test on a new drive, and a read-only on a drive that fell out of my RAID array. I want to see if it finds problems and how far along it is.
9
votes
4answers
4k views

Serve files over USB

I would like to be able to serve a section of my box's file system over USB to another computer. For example, if the files are on box A and I am reading from box B, then B would mount A, see those ...
4
votes
5answers
767 views

Small inexpensive *nix box?

I'd like to learn more about Unix & Linux and would like to set up a little home test server/ headless box. (I'm thinking of compiling from scratch, to learn how that works; either Gentoo Stage II ...
5
votes
2answers
706 views

Linux Distro specifically for benchmarking?

At my current position, we use some outdated proprietary software in order to benchmark new computers that the company is testing and evaluating for purchase. We would like to move on to something ...
14
votes
5answers
4k views

Getting information on a machine's hardware in Linux

How can I check what hardware I have? (With BIOS version etc.)