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

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1answer
43 views

Key is not being released on very short keypresses

On my keyboard, when I press a key very lightly and release it quickly (talking about probably 0.1s of button press here), the key does not issue a release event correctly and instead typed repeatedly ...
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1answer
698 views

Ubuntu 14.04 built in webcam not being detected

Hello I am running Ubuntu 14.04 and my webcam is not recognized. It used to work fine but recently it is not working. I got my screen replaced by dell and also the motherboard and heatsinks for a ...
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1answer
32 views

Clocks, Hardware, and Booting

A few days ago, I was having some difficulty booting my Mint 17.2 installation. Essentially, after boot my screen would go black, and I would not be able to do anything - even after some time, the GUI ...
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1answer
609 views

Trouble changing backlight brightness (/sys/class/backlight folder empty)

I have a small embedded system that I am working on that needs to be able to reduce its brightness for power saving reasons. The screen is connected by LVDS with separate Inverter Power Output ...
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1answer
110 views

What is /proc/dma? Is it just for legacy support?

I reading a Linux book that told me I can check the dma channels by reading /proc/dma. This is what I see when I run cat /proc/dma: 2: floppy 4: cascade I'm confused because that looks like old ...
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2answers
141 views

Sudden shutdown happens only when I have PhpStorm opened

I've had this reoccurring sudden shutdown issue happening recently, and it always happens when I have PhpStorm opened, I'm not sure if it's related, but it still seems random, meaning that sometimes I ...
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1answer
238 views

generate consistent machine unique ID in c programming

Is it possible to generate a unique ID that wouldn't change over time unless there is hardware changes. The hardware must be generated with a c program. That also would be great if it were robust to ...
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2answers
47 views

Network acting crazy… How can I know whether it's hardware?

I have a homeserver, with a built-in network card, ASRock E350M1 Motherboard. On the computer there's a Debian Jessie system on an SSD, and 4 HDDs in raid configuration for my data. I usually have ...
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1answer
173 views

Hardware error in syslog after gaming

Sometimes when I'm playing a game I'll get the following message from syslogd: [16789.554414] [Hardware Error]: Corrected error, no action required. [16789.554418] [Hardware Error]: CPU:0 (15:2:0) ...
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7answers
10k views

Can a laptop battery explode while using Linux?

I have a 2013 Retina MacBook Pro, and I really want to install Debian on it. I have the know-how and have had at least three Debian systems before this. I am very knowledgable with the command-line ...
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2answers
96 views

laptop with bad monitor turned into server: how to disable monitor

I have a laptop with an absolutly useless monitor (well, probably video card), so I put an Ubuntu 14.04 server on it. Of course if I turn it on, the monitor still turns on and blinks in vivid colors, ...
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1answer
36 views

how to find out how much power my external hard drive is using?

I want to monitor the power usage when plugged into my laptop (specifically voltage and current) of my hard drive during various activities. How do I find out if I am on Linux? (right now I am using ...
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1answer
147 views

xhci_hcp module constantly detecting devices

Problem I want to start getting into GPGPU work, so I got an ASUS Rampage IV Black Edition gaming motherboard. I thought it would support multiple GPUs well. However, I have had nothing but trouble ...
2
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1answer
313 views

How can two identical virtual addresses point to different physical addresses?

Following a fork() call in Linux, two processes (one being a child of the other) will share allocated heap memory. These allocated pages are marked COW (copy-on-write) and will remain shared until ...
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0answers
2k views

What is the difference between I2C and PS2 mode?

On my Dell XPS 13 9343 my touchpad can work with I2C bus or in PS2 mode. What is the difference between those two modes ? Why are they both available ? The output of xinput is : Virtual core ...
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2answers
970 views

Enabling graphics acceleration for OpenGL over remotely via VPN from Ubuntu client(my laptop)to Windows server(computation is here)

I have an access to Internet via a Wifi. Then, I have a VPN connection established from my Ubuntu laptop to a LAN network. My Windows Machine where computation happens using OpenGL is on the same ...
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0answers
52 views

A/D pins always read max (1023)

I am using the Aria G25 board from Acme Systems. I have their Terra board breakout. I have also asked this question on their google groups but thought it might be a more general issue so have posted ...
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1answer
55 views

Hardware specs for Linux machine for cluster administration [closed]

I have just started as cluster system administrator and was asked to choose some features to get bought a personal machine to work on, and most intensive calculations will be perform in the cluster. I ...
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0answers
33 views

Server hardware errors?

I have a large data server running ZFS-on-Linux under Debian 6.0.10, which has been running stably for several years. In the last two weeks, however, it's been crashing every few days and throwing ...
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0answers
79 views

PCI Device Missing After Reboot

I have a DVBSky T9580 PCI tuner card. My problem is that after rebooting,, the device dissapears, lspci does not list it any more. I tried rebooting with reboot command as well as shutdown -r 0. ...
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0answers
36 views

Random pieces of ancient hardware not working together (Mac G5, Sun network adapter)

This is probably some kind of weird esoteric hardware combination but it's not why I did it. It's just what I had lying around. I have a 2x 2ghz Mac G5 and I can't really bring myself to part with it ...
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0answers
30 views

External monitor script has become unreliable

I have been using the following udev rule and bash script to automatically configure my external monitor for some time now, however recently the script has become unreliable, usually doing the ...
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1answer
31 views

Use NVIDIA graphic card as regular resource

I don't use my graphic card anymore, but it is still laying there, idle. Is there a way I can turn it back on and use it just a regular, additional CPU/RAM for my laptop?
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0answers
11 views

How and when is keyboard data encoded from keyboard to application? [duplicate]

I hope this is not the wrong place to ask this, if it is, please point me in the right direction. As the title says, how and when is keyboard data encoded? I just wanna know in basic terms the ...
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1answer
241 views

Why are the up and down arrows keys not always working on multiple platforms?

Very recently, maybe within the last two weeks this issue has started cropping up: once maybe every two days or so, the up and down arrow keys simply stop working for a while - I can move the cursor ...
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1answer
245 views

Problem with internal USB hub & my smartphone

I have a problem when plugging in a smartphone, as journalctl shows below: jul 19 17:28:43 newhope.belkin.home kernel: usb 1-1: new full-speed USB device number 2 using xhci_hcd jul 19 17:28:43 ...
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1answer
179 views

lsusb shows USB devices that are not connected

I have the weird issue that lsusb shows USB devices that are not connected. We have a couple of devices connected via USB. To disconnect them from the system we disable the power to the USB port with ...
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0answers
205 views

Ubuntu 14.04 - Multiple Griffin Technology Powermate Knobs

I am running Ubuntu 14.04, and I want to run multiple griffin powermate knobs: https://store.griffintechnology.com/powermate. I want to map them to different keys other than audio control. I want to ...
2
votes
1answer
71 views

Get device's bus port

How can I get a list of device bus ports? For example the parallel port is the 0x378. Is there a command to list each port and its device? On Windows it is possible looking device detail in the ...
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1answer
102 views

Switching to Linux permanently [closed]

I have searched through the forum for similar answers but I had no success in finding a satisfactory one. Windows and I had a fight last night and I decided to break up with 'it'. :)) Therefore I ...
0
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1answer
441 views

Fresh install Debian Jessie over existing Debian Wheezy on laptop

I am very new to Linux and any sort of communities for that matter so if I'm posting to the wrong place please let me know. I was hoping I could find a solution to my "problem". I installed Debian "...
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1answer
2k views

How to check firmware version in solaris?

I have searched in /usr/platform/sun4u/sbin path. But not sure how to get the firmware version.
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0answers
37 views

X server error due to possible hardware issue?

I am running Linux Mint 17, and have encountered an X server error that prevented the OS from booting, similar to the error described here. Typically, such an error suggests a problem with the ...
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0answers
272 views

SSD installed, but shows as HDD in command output

Strange issue here. I have a 480GB SSD drive installed in this server. I installed it myself. I see it, it's there. But, I'm getting an incorrect output on a typically used command to determine if it'...
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1answer
2k views

Intel 6300 wireless card won't work on CentOS 7 - worked during install though!

I installed centos 7 on a laptop with an intel 6300 wireless card in it. During the install, the wireless card was available and I was able to connect to my lan. After the install, I don't see the ...
0
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1answer
120 views

Enable virtualization with gigabyte ud3 990fx

I'm trying to get the virtualization running : I have the following settings: Mainboard: gigabyte ud3 990fx CPU: fx-9590 Kernel: 3.11.0-12-generic Linux Mint 17 In the bios both svm as well as ...
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0answers
1k views

How to setup “Creative Sound Core 3D” on Debian Jessie correctly?

I justed installed Debian Jessie and was happy to see (or hear) that my Creative Sound Core 3D (as onboard chip on my Gigabyte GA-X99-Gaming 7 WIFI mainboard) worked out of the box when trying to play ...
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0answers
107 views

Linux Mint keyboard and mouse take a long time to work after boot

I turn my computer on, select my linux harddrive, and then I end up at the Linux mint encryption password area. I have to wait about 1 minute just for my keyboard and mouse to actually light up and ...
2
votes
2answers
111 views

why do some network cards need to load external firmware?

I have read this question/answer, but I still do not understand why some network cards work perfectly well without any additional firmware, whereas others need to load firmware to work. As a specific ...
4
votes
1answer
348 views

Set NetworkManager to ignore rfkill

My notebook does not have a hardware button to disable wireless. But NetworkManager and rfkill see wireless as hard blocked. Wicd and iwconfig works well. Is there any way to disable hard block check ...
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2answers
85 views

Log and plot temperature-time curve over given time intervall

How can I log and plot a graph of all available hardware temperatures (CPU, SSD, etc). CPU load over a given time (say a day or a week) in linux? The CPU is i7 haswell if this matters, I have ...
2
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0answers
342 views

Wireless LED indicator issue

The question itself: is there any way to make this indicator be turned ON and OFF depending on wireless status (not just blink when there is wireless activity)? After having installed Linux, I saw ...
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0answers
582 views

What does mt -f /dev/st0 erase do exactly on a tape drive?

What does mt -f /dev/st0 erase do exactly with a (LTO-6) tape drive at /dev/st0? It takes hours and seems to write many times. Does it write random data on the tape several times to delete the ...
0
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1answer
192 views

Linking two hardware serial ports

I have two micro-controllers which are connected to my computer(ubuntu 12.04) through serial-USB cables. One of the controllers (ttyUSB0) is programmed such that it sends data serially and another (...
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5answers
157 views

Prevent encrypted partition from running on other PC

Concise question: Is it possible to somehow bind partition encryption to hardware so it is impossible(very hard) to copy system to another PC and run there? Full story: We have a small embedded PC ...
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2answers
1k views

Installing an unauthorized wifi card in a Lenovo thinkpad edge 14

I took out a my Intel dual band Wireless AC 7260 card model number 7260HMW from another laptop. I wanted to install it in my thinkpad. Upon doing so and rebooting, the computer said unauthorized wifi ...
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0answers
32 views

Retrieve device manufacturer without sudo

I need to retrieve the manufacturer model of a linux device (laptop or desktop). I saw that you could use dmidecode | grep -A3 '^System Information' but it needs admin rights. There is any way to do ...
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0answers
108 views

Check for hardware damage (GPU)

I need to check for damage to my graphics card. I suspect I have done damage to my gpu through overclocking. Now, whenever I do anything graphically intensive my screen will flash various colours and ...
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0answers
68 views

How to get the Adaptec 1200A to work under Linux at UDMA/100 (instead of 66)

A while ago, I got myself a used Adaptec 1200A controller card to keep my onboard slots free for easier connect/disconnect of drives and now I am wondering why this card will only operate at UDMA 66. ...
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2answers
4k views

How can I get the Bluetooth working on my Lenovo Yoga 3?

I have a Lenovo Yoga 3 that apparently has a new Broadcom Bluetooth device. The bluetooth is detected at boot and when I try to pair a something in gnome, I can see a list of devices but none of them ...