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

learn more… | top users | synonyms

8
votes
2answers
8k 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 ...
0
votes
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 ...
4
votes
1answer
775 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 ...
1
vote
2answers
9k 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 ...
3
votes
1answer
1k 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 ...
1
vote
1answer
342 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 ...
1
vote
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 ...
3
votes
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" ...
4
votes
2answers
953 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 ...
0
votes
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 ...
1
vote
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 ...
2
votes
0answers
404 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 ...
19
votes
1answer
12k 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.
1
vote
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 ...
1
vote
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
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 ...
2
votes
1answer
426 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 ...
0
votes
0answers
226 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 ...
3
votes
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
votes
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
535 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
votes
3answers
11k 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 ...
0
votes
1answer
175 views

liveCDs detecting wrong video card

I just replaced my video / graphics card with a new model, the AMD firepro m6100. None of my ubuntu 13.10 based liveCDs are able to run correctly (manually running startx from tty1 fails, so that's ...
16
votes
4answers
9k 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 ...
0
votes
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 ...
0
votes
2answers
4k views

Linux fan control?

For some unknown reason, my laptop fan stays on consistently. Even when I'm using less than 2% CPU and the air coming out of the vent is seemingly cooler than the air in the room, the fan always stays ...
2
votes
1answer
996 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 ...
1
vote
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 ...
0
votes
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 ...
1
vote
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 ...
2
votes
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 ...
1
vote
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 ...
8
votes
3answers
8k 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 ...
3
votes
0answers
165 views

Suspend Linux (Mint) with external hard drive plugged in

I simply try to suspend the session while my external hard drive is plugged in (doesn't matter whether I have mounted or dismounted it, and this error does not apply to other filesystems, like flash ...
1
vote
1answer
38 views

Any reason an HP C7499A DVD ROM shouldn't work on an old Sun Ultra Enterprise II?

I'm trying to switch from a CD-ROM to a DVD-ROM on an old Sparc Ultra Enterprise II. I got this C7499A but I can't seem to access anything on it. I thought that since it's SCSI it should work even ...
2
votes
3answers
885 views

Starting Linux from power off at predetermined time (and executing command)?

To put it simply, I'm trying to use my computer as an alarm clock. It's slightly old and noisy, so I'd like it to start from power off at a scheduled time and then execute a command, such as playing ...
3
votes
1answer
4k views

Mint fan control

I've installed Mint 15 on my Alienware m14x and can't figure out one thing. For some reason CPU overheats and fan does not respond to that. It always stays calm and quiet. How exactly I can change ...
1
vote
0answers
351 views

Using Radeon on muxless system with multiple X servers

I'm using HP ProBook 4740s laptop with muxless hybrid graphics: root@mekras: lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) ...
0
votes
1answer
64 views

Debian Squeeze not detecting any hardware after Gnome 3.8 upgrade

So, somehow I accidentally upgraded to Gnome 3.8 (Don't ask me how, I have no idea). And after a reboot, none of my peripheral devices or interfaces are working. The built in mouse and keyboard do ...
3
votes
1answer
1k views

Interpret the output of lstopo

I have a output from lstopo --output-format txt -v --no-io > lstopo.txt for a 8-core node in a cluster, which is https://dl.dropboxusercontent.com/u/13029929/lstopo.txt The file is a text drawing ...
3
votes
1answer
105 views

Is there a tool that I can use to create a diagram of my system's architecture?

I'm looking for a tool that can create both graphical files as well as text based ASCII representations of my system's CPU & motherboard architectures.
5
votes
1answer
246 views

Why Nmap fragmented scan on Linux is only working from virtual environment?

OLD QUESTION AND TITLE (Look further down for the updated question): Why Nmap fragmented scan is only working on Backtrack? I spent quite a few hours today trying to capture and study some ...
4
votes
1answer
113 views

What is not accessible from userspace?

I read somewhere (3.1.3) that there's a high ring (supervisor mode) and a low ring (user mode) and that some "things" can be run only from the highest ring. What do they mean by "things"? I'd guess ...
1
vote
1answer
136 views

MAC Address changes after dirty shutdown

I'm having a strange issue which I originally thought was tied to the fact that I created an Ubuntu system from an image of another. However, after reinstalling Ubuntu from scratch I am getting the ...
1
vote
1answer
136 views

Touchpad utility

I'm new in the Linux area. I just installed Elementary OS, which is related to Ubuntu, and I want to know if there is a utility for my mouse pad. In Windows I had Synaptics that allowed me to scroll ...
0
votes
2answers
282 views

Hard disk power management with image toggling in display

We have a system in which we almost toggle some display data in the screen 24 hours x 7 days a week. Since our application runs every day, we see some hard disk failures in the field. Unfortunately, ...
0
votes
1answer
549 views

USB 3.0 host controller suddenly stopped working

sudo lshw *-usb:0 UNCLAIMED description: USB controller product: 7 Series/C210 Series Chipset Family USB xHCI Host Controller vendor: Intel Corporation ...
1
vote
1answer
72 views

Bad blocks only with extension cord?

My external hard drive was acting strangely, so I ran badblocks, and it seemed that nearly every block was bad from the first minute I ran it. If I did badblocks -v > file, the file was over 100MB ...
1
vote
1answer
641 views

Old laptop won't boot from live CDs

I've got an old Pentium III based Dell Laptop, the originally shipped with Windows 2K and has had Windows XP installed on it. I though I could get something useful out of it if I run Puppy, Lubuntu, ...