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

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steps to troubleshoot bluetooth dongle?

How do I troubleshoot, or at least gather more data in order to troubleshoot, a bluetooth dongle? In particular, from the CLI. On a lower level, I can see the bluetooth hardware: thufir@mordor:~$ ...
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1answer
22 views

Convert non-raid disk with data into RAID 1 disk (hardware controller)

I moved away from software RAID due to all the hassle it brings. After OS reinstall, I am left with only one drive. I ordered a hardware RAID controller today, and when the controller arrives, I'd ...
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2answers
53 views

How does Linux handle drivers when changing systems?

This has always made me wonder but how does Linux handle device drivers from system to system, so say you plug it in on computer A and then move to computer B with completely different specs. In ...
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1answer
19 views

Kernel and User space System Calls [closed]

I understand some complex internal of OSes, but I have a large gap in understanding kernel and user space. I will explain how I understand this now. First of all we have RAM for example 8GB, ...
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1answer
54 views

Recover data after hard drive faliure

A couple of days ago I tried getting an old server of mine up and running. It was working initially, but after updating and rebooting the system a few times the system refused to boot, dying at GRUB ...
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0answers
16 views

Ubuntu 15.10 on Dell Inspiron 13-7353

I’ve installed Ubuntu 15.10 on a Dell Inspiron 13-7353. Things work okay overall, but two critical problems have appeared. First, occasionally, when the laptop wakes up from sleep the screen will ...
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0answers
12 views

Check FN lock status (Dell XPS 13)

my Dell XPS 13 has a Fn-Lock (that's a key to use the Fn version of the F[1-12] keys without pressing Fn). Unfortunately, it doesn't have an indicator LED for it. setleds doesn't show it. Is there ...
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1answer
34 views

What does a “Synchronous” type detail mean in dmidecode?

I'm curious if my 2 DIMMs are running dual-channel or not and use: dmidecode -t 17 ... Type Detail: Synchronous ... What does a "Synchronous" type detail mean? Dual-channel?
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27 views

Grub (debian) will not start in AHCI mode

I was running my Debian (Acer laptop) for quite some time without much trouble. However, when I started it recently I've got message: No bootable device - insert boot disk and press any key It ...
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1answer
23 views

Console keymapping

I have installed Arch Linux on my Thinkpad W530, and none of the Fn-Fx keys or the volume buttons work. However, they do work before I have booted into Arch at the Grub menu. (I can change the ...
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1answer
28 views

How can I find if my wifi card supports 802.11ac?

I am unsure if my wifi card supports 802.11ac. How can I find out this information?
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2answers
163 views

How to find serial number of Solaris server?

Is there any command which will be available on Sun Solaris Netra T5220 server, to get the machine's serial number?
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2answers
33 views

Is this “Hardware Error” when using Matlab in Fedora really a hardware problem or could it be software?

I often found the following problem when I using Matlab 2012 in Fedora 20, during or after fft calculation or plot figures. The following is the error massage: [ 635.157606] mce: [Hardware Error]: ...
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1answer
37 views

Control fans of Samsung NP900X3E

I have a Samsung NP900X3E laptop and I would like to control the fans as one of them is making weird noise. I'm running Ubuntu 14.04.4 LTS with "Linux laptop 3.13.0-85-generic #129-Ubuntu SMP Thu Mar ...
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1answer
79 views

Linux command to find SD card UUID on Ubuntu/Debian

What is the Linux command to find SD card UUID on Ubuntu/Debian ? BTW: My SD card is not a USB device.
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1answer
35 views

How to map Linux hard drive identifiers like “sd 3:0:0:0:” to ones like “ata8:”? [duplicate]

In my kernel log, I can see entries like: [ 0.765510] sd 3:0:0:0: [sdb] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB) and when something fails, it's usually something like: [ ...
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0answers
34 views

Linux HP Pavilion overheating

I'm new to Linux OS and I'd like to dual boot it with Windows 7 on my HP Pavilion 15 P257NL. I tried installing Ubuntu 14.04 LTS, but the pc started to heat a lot (only on Ubuntu, it kept working as ...
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1answer
109 views

How can I test a used computer for problems?

Are there any commands that I can use on a secondhand laptop or PC running Linux that will tell me if there are any problems with the system? If so, what are they? For example, battery life/condition,...
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1answer
64 views

accelerated HTML5 video: what hardware is supported well by Linux?

After many, many, many failed attempts to get accelerated HTML5 video working on any hardware (tested about 5 machines) I came to the conclusion that accelerated HTML5 is something difficult under ...
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0answers
9 views

My external HDD gets unmounted when I suspend my laptop

I have an external 2.5" HDD, power via USB. When I suspend it, the drive powers down. When I wake the computer up, the drive is detected to be plugged again. Hence it's unmounted (my computer is not ...
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0answers
30 views

May recurring X server issues be a hardware problem?

This is my first time asking a question here. Please correct me if I don't follow the process correctly. I also know that a similar question has been asked here - It was said though that the problem ...
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1answer
134 views

Re-reading the partition table failed with error 16: Device or resource busy

When re-partitioning the USB drive on CentOS 6.x getting following error and kindly advise to solve this. Disk /dev/sdb: 31.5 GB, 31466323968 bytes 255 heads, 63 sectors/track, 3825 cylinders Units = ...
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1answer
35 views

Linux setup compatibility

I want to setup a Linux environment, but I want the system to be bootable in two or more computer systems with different sets of hardware. Can Linux provide that level of hardware abstraction given ...
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0answers
36 views

Set Default Boot Device for XServe in Open Firmware

I have an old Apple XServe G4 that I successfully created a dual boot of Mac OS X and FreeBSD 10.2. In order to boot the machine, you have to go into Open Firmware and issue a boot command... I ...
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0answers
8 views

lsusb can't detect pickit2

I have installed Arch Linux (i686) every thins works fine but when I try ti plug the PicKit2 (Programmer for PIC MCUs) and run lsusb it doesn't shown in the list I tryed it on Win7 machine and works ...
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0answers
11 views

Remotely use a platform device

I have a linux/android device with a certain hardware module (lets call this pc A), and a driver which uses the hardware as a platform device. Because of testing/os restrictions I'd like to be able ...
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23 views

Problem installing Panasonic's KV-SS080 Scanner

I bought a used Panasonic's KV-SS080 but so far I was not able to get it working. For lsusb, here is the response: Bus 001 Device 006: ID 04da:100f Panasonic (Matsushita) For sane-find-scanner, ...
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1answer
52 views

How to make FreeCAD utilize multple cores?

I am currently on a modified version of debian-standard, jessie, using xfce and LightDM with some amd drivers for the gpu. But my issues is that I am using an 8 core AMD FX 8320, all cores detected ...
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1answer
32 views

Installing Linux as the primary OS on HP Pavilion DV-7-1225-ez

I have an old entertainment laptop, HP Pavilion DV7-1225ez, which I would like to turn into a portable development/learning computer. I am now going through various linux distros to find the most ...
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1answer
41 views

Can't boot into my Linux partition--disk is supposedly at fault, but scans show no errors

I'm trying to boot into my Linux partition, but receive this message: Welcome to emergency mode! After logging in, type "journalctl -xb" to view system logs, "systemctl reboot" to reboot, "systemctl ...
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0answers
90 views

Force Broadcom bluetooth to see wlan0 in down state

I`m running a 64bit Arch Linux on an old Dell Laptop. The wireless hardware, unfortunately, is from Broadcom (BCM4312 LP-PHY for wifi and BCM2046B1 for bluetooth). A Lenovo bluetooth mouse works and ...
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10 views

How can I find the module responsible for interaction with keyboard [duplicate]

I have a laptop and want to be able to turn off keyboard for a while. I use this code: modprobe -r usbhid sleep 10 modprobe usbhid But as my keyboard is not usb, and it only blocks mouse. How can I ...
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59 views

Storage device trouble: IO errors but no bad sectors?

I have a lightly used spinning metal drive (internal) with some VMs on it. I'm running into IO errors while running a VM and upon closer examination I have found a virtual disk file that is reporting ...
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0answers
26 views

Is it safe to retask other audio ports as lineins using Jack?

So, I wanted to setup my Linux PC to record multiple line in audio devices without putting holes in my wallet. Then I found a tool called hdajackretask which lets me convert any port into any other ...
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1answer
43 views

Is host-to-host file transfer possible using USB Type-C?

I'm doing a warranty replacement on my Chromebook Pixel 2, and want to transfer data from one laptop to another. The Pixel 2 has two USB type-C ports. I'm running Arch Linux on the old one. I'd like ...
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2answers
458 views

How to make my RTL8191SU Wifi adapter go in monitor mode?

I recently bought this WLAN adapter on Amazon. I am trying to use it with Kali-linux, but it looks like it doesn't want to go in monitor mode: Error for wireless request "Set Mode" (8B06) : SET ...
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2answers
32 views

Installing Linux on hard disk that will be used by another computer with different hardware

I was given a laptop with a totally dead display. I do not want to pay to replace the broken display, but I would like to use the laptop as a server and connect to it via SSH to control it. I have ...
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0answers
43 views

Change which brightness device gnome uses?

I am using a lenovo thinkpad w520 running fedora 22 and gnome 3. This particular laptop has both an integrated (Intel HD Graphics 3000) and discrete graphics (NVIDIA Quadro 1000M) card. When I'm in ...
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1answer
56 views

How to distinguish between v2 and v3 of Xeon processors?

I'm trying to determine what processor my server is running. I tried looking at /proc/cpuinfo, using lshw and dmidecode. In all of them I get: Intel(R) Xeon(R) CPU E31220 @ 3.10GHz How do I ...
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0answers
25 views

lshw HWPath priority — how to determine

I have a project here at work where I'm attempting to definitively map ethernet MAC addresses to physical ports (IE card 1 port 0 is eth0 (mac xx:xx:xx:xx:xx:xx) and a non-technical operator can look ...
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0answers
95 views

Find a IR transmitter device

I would like to use the IR transmitter included in a cubox. I did not found any documentation to use it, so I would want to learn how to communicate with periphericals on linux. Commands like lshw,...
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0answers
176 views

SD Card not recognized

I have 2 laptops with Linux Mint 17.2 installed. One recognized SD card without any configuration. Other recognized SD card, but don't read this content. This message appears in GParted: Can't ...
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1answer
41 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
459 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 ...
2
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1answer
30 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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0answers
27 views

How to broadcast voice from USB microphone to apache?

I have a webcam and a microphone. I wan't to send both, sound and video to my index.php so i can see the video from the camera and hear the sound from the microphone. I already managed to stream the ...
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1answer
556 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
95 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
135 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 ...