Questions tagged [interrupts]

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Touchpad utilizes CPU even if totally disabled in BIOS and X

I have problems with CPU spikes from irq/204-rmi4_sm when I touch the touchpad in a Lenovo Thinkpad Extreme. I have disabled the Touchpad in BIOS as well as in X. However still the IRQ is fired every ...
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External interrupts on Ubuntu 20.04

currently I work on a tiny computer running Ubuntu 20.04 server. This computer contains several pins for SPI, I2C and so on. On similar computers (like the Raspberry Pi) there are also pins used as ...
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Error on MPI while executing REGCM

While starting a simulation on REGCM, I executed the command mpirun -np 2 ./bin/regcmMPI sensitivity01.in Which gives me the following: This is RegCM trunk SVN Revision: compiled at: data : Sep ...
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Why would KVM intermittently cause 100% CPU load by "System interrupts" in a Windows 10 VM?

I'm running a hundred Ubuntu 16.04 LTS servers with basically identical hardware distributed worldwide. (I'm working on upgrading them to 20.04 LTS but certain unfortunate design decisions on the part ...
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Ubuntu behaves weirdly when press some keys

When I press any one of these keys ( left-ctrl,Tab, t, y, [/}/} ) it will automatically increases the brightness untill press the alt key.When I press alt key it will stop. Why this is happening? And ...
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Interrupt `mv` command by ctrl+c, and disk space is lost

To transfer large amount of data, I used mv from the first HDD called /KRX to other HDD called /data_tmp. But I interrupted the mv process using Ctrl+C, and I fill /KRX with other data. Then when I ...
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Ctrl-C interrupts process, but doesn't clear terminal line

When I press Ctrl-C, I receive interrupts for running processes (e.g., sleep 10, followed by Ctrl-C, will immediately terminate the running process). However, it doesn't clear the terminal line - in ...
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Touchpad causes huge amount of interrupts and high power usage

I have an issue with the touchpad on my notebook where if I use it, it causes a high amount of interrupts which results in significantly higher CPU usage and power drain. The following snippet is ...
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3k views

Ubuntu 20.04 - High load on CPU because of IRQ 126

HP Pavilion - 14-al103ne Ubuntu 20.04 'top' command shows irq/126-aerdrv always running eating a lot of CPU.Top screenshot 'powertop' and 'cat /proc/interrupts' also attached. Interrupts and ...
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Keyboard interrupt stops working after a while

Sometimes, after a while running processes and different commands in a terminal tab, the tab stops reacting to Ctrl+C. It simply prints ^C but does not interrupt. Other tabs do handle interrupt ...
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Is there a way to determine which hardware is throwing excessive interrupts

I am trying to get an old P.C. working so that I can use its floppy drive to read some old diskettes. It boots from an Ubuntu 14.04.1 LTS DVD but it has a really bad, "cursor drag," as I call it. ...
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Inter processor interrupts on a particular core

Currently I am looking into a performance issue over NXP platform for DPDK forwarding application. following is the setup information: Application running on core 7 and it runs in a tight loop for ...
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3 answers
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Ubuntu 16.04 LTS IRQ kernel panic at shutdown - Alienware R7 desktop

I freshly installed Ubuntu 16.04 LTS along with existing Win 10 that came with the PC, updated nvidia drivers. Somehow, I can't shutdown, and get IRQ interruptions in a black screen that the system ...
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Ubuntu 16.04 a lot of kworker processes

I have an ubuntu 16.04 server with kernel 4.10.0-37-generic. It's metal server, not virtual. There are a number of kworker processes (about 109-115), every kworker consumes CPU (up to 4%). Also I ...
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How to set Intel SSD NVME irq Affinity on Ubuntu 16.04 LTS?

Thanks for reading this question (I looked everywhere to find an existing answer without success...) The question is in the title but here are more details: Here is my setup: I'm working with a ...
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wlo1 Interrupt:19

I have got a problem with my network. After I installed bunch libs and Programms (i am sure that none of them is about the network) to my ubuntu 16.04.2 LTS, I am no longer able to connect to wifi. ...
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Is there a way to detect whether a skype call is in progress? (dbus? pulseaudio usage?)

I built a little gadget that hangs on my office door. I can light it up via a script on my computer to indicate I'm busy and people shouldn't enter. I'd like to run that script, a.k.a. signalling I'm ...
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Does my PCI card have shared interrupts?

I'm trying to get VGA passthrough working on VirtualBox with a Windows guest. Per the VirtualBox manual: Limitations: 1. Only PCI cards with non-shared interrupts (such as using MSI on host) are ...
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15.10 to 16.04 Upgrade installation interrupted

During the upgrading installation from 15.10 to 16.04.1 the power went off, now the computer cannot launch the OS, so I cannot do anything. What can I do? Thank you in advance for your help
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847 views

IRQ from Realtek WiFi are loading CPU

I have problem with my Toshiba Satellite C850-D3K laptop with Ubuntu 16.04 installed and RTL8723AE wireless adapter. The thing is that CPU consumption may go up after a while (30 mins - 2 hours) by no ...
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Boot time errors about ACPI, unsupported splx structure and a lying master control interrupt

I am getting boot time errors in ubuntu 14.04. After booting it works without any problem. Errors displayed are: 0.669116] dmar: Failed to find handle for ACPI object \ SB.PCI0SD After SD some ...
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enable parallel port interrupts/ access in Ubuntu 12.04

I need to interface a mid 1990s laboratory instrument to Ubuntu 12.04 for moderately high speed data acquisition ( 100 Usec) from the instrument . The instrument requires ( will not even run without )...
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Define IRQ for USB keyboard?

I think my keyboard is suffering from IRQ-deprivation. When copying data over the network, the keys start to "stick" and "stutter"... Is it possible to assign my keyboard a high-priority interrupt? ...
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Interrupted apt-get starting whenever I do anything with apt-get

Some time ago I followed those instructions, because I wanted Java 8: Install Oracle Java 6 / 7 / 8 on Ubuntu 13.10 Installation did not complete successfully. Now whenever I start apt-get with ...
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8 votes
2 answers
6k views

log error: "[drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!"

I get this error after installing Kubuntu 15.10 when restart Kubuntu: [ 74.873008] [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)! I use kernel 4.2.0-16 and KDE 5.4....
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Interrupted update OS [duplicate]

I decided to update OS to 14.04. While downloading packages i noticed download totally stopped and had to interrupt it, and that happened several times. Then it started installing everything and it ...
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4 votes
1 answer
2k views

High number of interrupts on Ubuntu 15.04 on Dell XPS 13 2015 (9343)

In powertop I noticed a high number of interrupts 'INT3432', which I think would be either the touchpad or sound card. I am concerned on the effect on the power consumption and battery life. FYI I ...
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Upgrade install from 12.04 to 14.04 was interrupted

My computer was in the process of upgrading from version 12.04 to 14.04. The computer was turned it off in the middle of installation, now I can't use my computer. I don't know what to do now. My ...
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