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

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How to diagnose CPU performance problems?

Recently I bought a new netbook based on AMD A4-1200 CPU and installed Linux Mint 17 with XFCE. RAM is 4GB So, testing some of my programs, I found very strange behavior. On random intervals, the ...
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Debian Squeeze: TCP/ICMP stops working suddenly (R8169 Driver)

we suddenly see our NETWORKING stops (TCP/UDP/ICMP) in our client system. tcp: We tried reaching our server every 5 seconds.But , there was no connection establishment TCPDUMP REF: ...
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How sane are my hard disks? [on hold]

Some time ago, my professor dropped a fact(oid) in lecture about Microsoft researchers finding a correlation between data integrity and hard disks passing through flight (i.e. their people taking ...
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3answers
1k views

Harddisk serial number from terminal?

I have multiple harddisks which get connected to my server and I'm not sure which one is what in the view of sdXY . If I can see the serial numbers of my harddisks from terminal, I can easily identify ...
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1answer
104 views

How can I get this proprietary low-vision camera working in Linux?

I am a visually impaired Computer Science student, and use a special USB camera to zoom in on the board/projector during lectures. The camera only officially supports Windows, and I've been using it ...
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1answer
620 views

Can I use a parallel port as a CUPS input device?

I have an old piece of a hardware that does diagnostics on medical equipment. It prints out results over a parallel port. Is there any way to have CUPS accept jobs from a parallel port and redirect ...
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1answer
651 views

Debian Sid, AMD RS880 [Radeon HD 4250], black screen on boot

My computer booted under Debian Wheezy (3.2 kernel) with no graphics problems whatsoever. After updating to sid (3.10 kernel), the screen goes black (that is, the display flashes a bit and then goes ...
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3answers
760 views

Do different distros (but same kernel ver) have same hardware support

As far as I know the device drivers are located in the Linux kernel. For example let's say a GNU/Linux distro A has the same kernel version as a GNU/Linux distro B. Does that mean that they have the ...
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1answer
623 views

azap from LinuxTV dvb-apps strange signal behavior with Hauppauge WinTV-HVR 950Q

What I want to do I have a Hauppauge WinTV-HVR 950Q USB-TV-Stick. I want to use this stick to successively tune to and read in a certain live TV stream. What I do I trigger a scan and save the scan ...
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3answers
91 views

Is there any way to know the size of L1, L2, L3 cache and RAM in ubuntu?

Is there any way to know the size of L1, L2, L3 caches and RAM in Ubuntu?
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1answer
819 views

Problem with former RAID hard drive settings in Linux Mint 17

I'm new to Linux, just installed Linux Mint for the first time. I have two hard drives which were previously in a RAID configuration. Now before I have installed Linux I've changed them to individual ...
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1answer
55 views

MCE error: MCA: Internal parity error

I have an unstable machine running Ubuntu 14.04 LTS which passes 9 hours of memtest86. I get these: Hardware event. This is not a software error. MCE 0 CPU 1 BANK 0 TIME 1414735539 Fri Oct 31 ...
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12answers
188k 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 ...
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Oculus Rift on Linux

Sorry if this isn't the right place for this question. I do realize this is a somewhat experimental piece of hardware. Still, it would be nice to see how much progress can be made here. I'm running ...
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understanding CPU,RAM,and Hard Disk Drive [migrated]

I'm currently reading about how the computer works, specifically how the CPU, RAM, hard disk drive work together simultaneously. According to what I have read, the CPU uses what is called a control ...
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How to find out if F20 (Linux) is reaping the maximum benefit from my hardware

I have a new laptop HP Pavilion x360 and I wiped out the windows 8 and replaced it with Fedora 20. My question is if there is a way for me to find out if my display driver can be improved or if any ...
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2answers
1k views

Get monitor make and model and other info in human readable form

I have extracted the shorthand version of the current monitor attached to the computer. Here is an example: vendor "VSC", prod id "18500" In Ubuntu's Monitor Preferences, it is identified as ...
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2answers
9k views

How to Determine the Amount of RAM Slots In Use?

I forgot how many RAM modules are installed on my laptop. I do not want to unscrew it but want to look it up on the console. How do I gather this information?
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1answer
50 views

What does it mean when my wireless lan is “hard blocked”?

I am attempting to setup wifi on my beaglebone. root@beaglebone:~# rfkill list all 0: phy0: Wireless LAN Soft blocked: no Hard blocked: yes unblock does nothing: root@beaglebone:~# rfkill ...
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1answer
82 views

How to stop CPU fan in Linux?

I use an old computer. CPU fan creates big noise. Sometimes CPU fan suddenly stops and does not work for a long time, and CPU does not get heated in these long periods, because I use very light-weight ...
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2answers
30 views

email alerts when serious system errors occur

I was greping syslog on a server for errors and noticed these lines that had nothing to do with what I was looking for but was alerting enough: kernel: [8456851.218586] ata2.00: irq_stat 0x08000000, ...
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1answer
1k views

How to monitor RAM ECC errors on Ivy Bridge Xeon E3 processor in Linux?

How can I monitor if there are any errors in RAM that get corrected by ECC? The processor is an Intel Xeon (Ivy Bridge) processor, the operating system is Scientific Linux 6.3. On a previous system I ...
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1answer
35 views

Does the NICs have any kind of log?

Recently I had an issue with my server, my nagios couldn't ping it and lost connection with the NRPE daemon, in my host provider interface I could see the server was ACTIVE but either I couldn't ping ...
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211 views

How to use INSIGNIA USB bluetooth adapter on Debain (Kali Linux)?

I've just purchased a USB Bluetooth adapter for my computer the brand is Insignia and I was wondering if it's possible to use it on Debian (Kali Linux)? Ok I got it to recoginze the usb device by ...
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3answers
1k views

Are the major, minor number unique

Are the major, minor number Unique? Do we have any citations and reference to it? NAME MAJ:MIN RM SIZE RO MOUNTPOINT sda 8:0 0 465.8G 0 ├─sda1 8:1 0 298.2M 0 ├─sda2 8:2 0 ...
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1answer
95 views

How to test an ethernet card?

I have a USB->Ethernet card that may or may not be somehow broken. The problem is I don't really know how to test it. I have a normal Ethernet port as well, so I can hook a (already tested) cable from ...
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1answer
32 views

Hardware problems, can I reinstall OS?

I have managed to break physically break my internal screen on my laptop, I have a sony vio E17 which is connected to a external screen. Yes I have unplugged the internal screen. My main and root ...
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How to create a fingerprint of the hardware from a dedicated root server? [duplicate]

Recently our ubuntu root server has been replaced after some failures. Unfortunatelly we cannot confirm if it really has been replaced or just some parts. What is the best and most thorough way to ...
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1answer
240 views

Obtaining information about system hardware

If I want to accurately save information about the hardware I am using as a reference, what is the best way to do it? Are the contents of /proc/meminfo sufficient?
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1answer
19 views

Is there anyway to get the hardware information on a hardware RAID 1 while inside of the OS?

Is there any way to see the information on a hardware raid while still being in the OS? Things to note: I am remotely connected to this machine (so I cannot physically see the information of both ...
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100 views

Journal commit I/O error for Seagate Expansion external USB hard drive

I am using Debian 7.6 (amd64) and for some reason when I am trying to read or write to my Seagate Expansion 1TB external USB drive, I am getting input/output errors ... Here is what the output of ...
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2answers
3k views

Lenovo T440s Fingerprint reader in Fedora 20

I just got my new Lenovo T440s and installed Fedora 20 with Gnome 3 on it. Everything runs smoothly, except for the fingerprint reader. Its got a Validity VFS5011 (138a:0017) device which is not yet ...
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1answer
54 views

What are PCI devices?

In Linux, the lspci command lists all the devices in my laptop (including AGP, USB, SATA, SCSI, bridges, ethernet, etc.). The man lspci command gives me this information: lspci - list all PCI ...
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1answer
588 views

APEI Generic Hardware Error

Over the past week my server (running Debian Jessie) has rebooted twice. In the syslog I see this before each reboot, and at no other points: Aug 15 13:32:58 hoshimiya kernel: [296512.005355] ...
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1answer
126 views

Mouse pointer moves on its own

When I leave the mouse (Logitech Performance Mouse MX) alone, it moves (somewhat continuously) ever so slightly on its own! This causes several issues: when watching a video full screen, the seek ...
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2answers
3k views

How to detect a possible hardware error?

I'm running Debian Wheezy on a HP Pavilion dv7 laptop and it freezes every now and then, requiring a reboot. One time it didn't even load the operating system, but it wasn't I who was using it so I ...
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1answer
285 views

Getting capabilities of my CD/DVD drive when wodim --devices doesn't work

I used to be able to run either commands successfully on my Fedora 14 Thinkpad T410 laptop: $ wodim --scanbus $ wodim --devices However since upgrading to Fedora 19 this no longer seems to work and ...
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1answer
87 views

Does BIOS device whitelist affect Linux?

Starting with 2002, Lenovo (actually, it was IBM back then) started whitelisting the wireless adapters and other devices allowed to be used in their ThinkPad laptops. Some other manufacturers are ...
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3answers
67 views

How can I know the max possible trasmit power of my wireless card?

Is there any way for me to tell the maximum possible power of my wireless card from within Linux? Or do I need to find the product number of the card, and search for specifications like that online?
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Keyboard is disabling

I stuck with a strange problem on OpenSUSE 13.1, after some random uptime my keyboard is disabling. I'm not even sure how to concretize this problem, this happening randomly and I can't see any ...
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54 views

Figuring out physical cache layout in FreeBSD

I'm trying to figure out they physical cache layout of my CPU in FreeBSD 10. I see the following from sysctl kern.sched.topology_spec kern.sched.topology_spec: <groups> <group level="1" ...
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2answers
767 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 ...
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4answers
1k views

generate consistent machine unique ID

Can we generate a unique id for each PC, something like uuuidgen, but it will never change unless there are hardware changes? I was thinking about merging CPUID and MACADDR and hash them to generate ...
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91 views

Debian disables IRQs

It's been two days that my Debian Wheezy 7 randomly disables IRQs apparently with no reason. After the IRQs are disables, I'm unable to mount hard disks and I have to reboot. This is the output of ...
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2answers
225 views

What is causing a pause during the system device probe?

I am running FreeBSD 10.0-RELEASE. During the boot device probe there is a two-times 30 second pause. The output relevant to this is # dmesg ... (aprobe0:ata0:0:1:0): ATAPI_IDENTIFY. ACB: a1 00 00 ...
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How do I know from a BeagleBone Black if it is connected via USB (as a client/slave)?

BeagleBone Black has an USB port which allows the user to access it through ssh. In general, we could say that when you plug it to a PC, the PC is the USB host and the BBB is the USB client. On the ...
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Linuxwacom xsetwacom/xorg.conf

I have a CentOS 6.2 workstation with linuxwacom 0.21.0 installed. I am trying to map a button on a cintiq tablet to a keyboard key. I can do it successfully using: xsetwacom set "Wacom Cintiq 24HD ...
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1answer
380 views

List All Network Printers (including ones not installed)

It is easy to list the printers you've already installed with this command: lpstat -a However, this does not list network printers you have NOT installed. nmap will scan for all open ports on the ...
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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.
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Is there a limit of GPIOs that can be used in Linux?

When it comes to use GPIOs, is there a limited number that can be used in Linux (except through the limitation of the physical availability/amount of the ports/pins) or is it theoretically possible to ...