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

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46 views

is this a keyboard hardware limitation?

I have remapped Caps_Lock to Ctrl_L on an ancient mechanical keyboard. It is still impossible to use the caps lock key to produce key combinations like C-e. xev shows the following sequences are ...
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0answers
188 views

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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3answers
1k 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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3answers
7k 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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3answers
2k 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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3answers
200 views

Extract Bluetooth MAC Address: hcitool dev

I have to extract from the command hcitool dev only the MAC address of the bluetooth dongle. Output of hcitool dev is: Devices: hci0 xx:xx:xx:xx:xx:xx I write this output to a file and try to ...
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1answer
1k 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
787 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
111 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
41 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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0answers
2k 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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1answer
3k 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
35 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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0answers
19 views

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 ...
0
votes
1answer
59 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 ...
3
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1answer
432 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?
5
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1answer
149 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 ...
0
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1answer
156 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 ...
5
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1answer
5k 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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votes
1answer
769 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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vote
1answer
341 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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0answers
39 views

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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3answers
4k views

How can I know the max possible transmit 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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5answers
14k 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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0answers
254 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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0answers
324 views

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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0answers
401 views

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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0answers
49 views

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 ...
2
votes
1answer
2k 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 ...
2
votes
1answer
2k 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 ...
3
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0answers
132 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
942 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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0answers
128 views

Pcie 1.1 device is not detected on a pcie gen 3 slot

My PC is running in Ubuntu 12.04 LTS with kernel version 3.11.0-23. The link below is my PC model: http://www.villman.com/Product-Detail/HP_Pavilion_500_232d I inserted a x4 pcie 1.1 device on the ...
2
votes
1answer
425 views

Direct i2c hardware access

I have a custom hardware, i.mx6q based board, running a custom stripped version of Debian, the usual Linux tools to make life easy are not available. Can I read and write to i2c directly with root ...
2
votes
1answer
2k views

Realtek RTS5209 PCI-E Card Reader only work if card is inserted before boot

Hardware Info Laptop Model: Sony Vaio Pro 13 Problematic Hardware: Bulti-in Realtek Semiconductor Co., Ltd. RTS5209 PCI Express Card Reader Problem description Here is the problem, if I boot with ...
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0answers
225 views

Extremely slow CD-ROM burning

When I try to burn a CD-ROM using K3B, the burner slows down from 10x to 0.12x after writing exactly 71MB. Consequently, burning a 142MB live CD takes more than a hour. Why is this happening? The ...
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0answers
730 views

Microphone not working on Centos 6.5

I have installed CentOS 6.5 on a Dell Insperion with an Intel chip. I first noticed that my microphone is not working on Skype on CentOS although it was working fine with Windows 7 on the same box. ...
2
votes
1answer
1k views

linux command to list details (like PID, VID) of connected devices to the serial port(s) (like RS232) of a computer

with USB port we can search Product ID (PID) and Vender ID (VID) of connected devices by using lsusb command. Is there a similar way to get PID and VID if the same device is connected to RS232 serial ...
2
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0answers
54 views

Creating my own “BBB image” for installing it in several BBBs?

I have been working with a Beaglebone Black for a while now, I have created a software for a device which I am happy with. Now I have a few more Beaglebone Blacks where I would like to install the ...
0
votes
2answers
532 views

Hardware requirements for building a Debian server that will run as ltsp, vpn, and fileserver

I will be building a server based on Debian that will have several functions in a small office (5-10 users). The primary function will be as a file server, but I would like to set the office up to ...
16
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3answers
10k views

how is page size determined in virtual address space?

Linux uses a virtual memory system where all of the addresses are virtual addresses and not physical addresses. These virtual addresses are converted into physical addresses by the processor. To ...
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0answers
34 views

Where to emit hardware events?

What is the most common way to emit events from hardware sensors? Use ACPI events, send signals via DBUS? My goal is compatibility so other apps can easily use those inputs. What is the Cleanest ...
2
votes
1answer
994 views

machine hardware name, processor type and hardware platform

The followings are the machine hardware names, processor types and hardware platforms returned by uname: on a server (with some 64-bit Linux distribution) -bash-4.1$ uname -m x86_64 -bash-4.1$ uname ...
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3answers
6k 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
651 views

Do I have two VGA compatible controllers?

lshw shows two VGA compatible controllers. Where are they located? What are they used for respectively? Which one do you recommend to use? Which of the two controllers am I using currently? With ...
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2answers
474 views

Linux dmesg errors, motherboard issue?

When doing heavy disk IO on my system (16GB RAM, 6 cores, RAID0 PCIe SSD), the system stalls and eventually crashes. Normal day-to-day disk IO is fine, just prolonged read/write such as a database ...
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6answers
35k 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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0answers
275 views

weird problem with 64 bit install and memory

I have a laptop with 8gb of RAM in two 4Gb slots, the processor is 64 bit compatible. However when I try to install 64 bit version of Linux (I tried, mint, arch, manjaro), it refuses to load the ...
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1answer
265 views

Brightness issues (etc.) with Nvidia Card in OpenBox

After a fresh install of Crunchbang Linux 11 on an Intel 486 powered machine I struggle with setting the display brightness which blasts at 100% … this is really, physically painful. My efforts ...
2
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0answers
1k views

Pulseaudio and Pavucontrol very unstable

I've recently installed ArchLinux on my desktop, together witht the GNOME3 Desktop. I installed pulseaudio and pavucontrol, which both seem to be very unstable. First I couldn't get my headset to ...