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Questions tagged [irq]

An IRQ (interrupt request) is the process where a device triggers a hardware interrupt on a processor. When this happens, the processor stops (and saves) the current executing environment, and services the hardware's request. Furthermore, it is possible to prioritize these requests go service some before others.

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Configure properly irqbalance to improve the network traffic

I have a debian 12 machine that gets a lot of softirqs by calling cat /proc/softirqs NET_RX on CPU1 is huge compared to CPU0 I would like to assign the irqs on both cores by using the switch on ...
user3450548's user avatar
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2 answers
222 views

Win11 21H2->22H2 - Areca RAID card stops working

I am currently running Windows 11 21H2 and everything works the way I want it. However, when I try to upgrade to version 22H2, the upgrade itself works fine, but after that, my Areca RAID card (ARC-...
pepak's user avatar
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3 votes
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Manjaro no irq handler for vector

When booting and at shutdown my relatively fresh install of Manjaro (uname -r: 5.9.16-1-MANJARO) on my HP Spectre x360 Convertible 13-ac0XX I get a an error message: [ +0,000425] __common_interrupt: ...
oelsardine's user avatar
1 vote
3 answers
580 views

Why is my device IRQ not appearing?

I have an USB external audio interface that constantly throws BSoD with IRQL_NOT_LESS_OR_EQUAL when plugged in. (The vendor drivers are definitely to blame here, but they are unmaintained and I need ...
Arthur Attout's user avatar
2 votes
0 answers
658 views

why do i see the message "do_IRQ: 5.33 No irq handler for vector" on my dell xps 15 9550?

Every time I suspend/unsuspend my laptop (Dell XPS 15 9550) I see this kernel log: Message from syslogd@cruz-XPS-15-9550 at Sep 14 07:58:31 ... kernel:[ 725.565407] do_IRQ: 5.33 No irq handler for ...
morhook's user avatar
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1 answer
869 views

System interrupts/DPC/ISR appear to be causing sound distortion in Windows 10. How can I determine the root cause?

I am having problems with audio distortion in Windows 10, but it varies in severity between apps. Foobar2000 is very heavily distorted on most tracks, with buzzes and skips. Windows Media Player also ...
Stonecraft's user avatar
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3k views

interrupt priority control - Windows 10

I am trying to figure out best interrupt priority for devices in Windows 10. I was able to find that users had good experience prioritizing cmos and gpu. That help me a lot reduce input lag. I have ...
salamander1238's user avatar
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2k views

Is it possible to assign IRQs in Windows 10?

For some PCI devices, I use specific IRQs to call interrupt service routines. If our video card is using the standard "Microsoft Basic Display Adapter" driver, our interrupt service routines run ...
Brian's user avatar
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1 vote
0 answers
150 views

Slow SATA I/O after kernel oops (SuperMicro X11SBA-LN4F)

I am in the process of replacing my (Gentoo) Linux router with a new one built using a SuperMicro X11SBA-LN4F. I used my existing Gentoo Linux router's configs as a starting point (including the ...
Chris Ribble's user avatar
28 votes
1 answer
16k views

What exactly is IRQL_NOT_LESS_OR_EQUAL?

What exactly is IRQL_NOT_LESS_OR_EQUAL? What is IRQL? What things use IRQL? Why does it need to be less or equal? What would cause it to not be less or equal? Why can't the OS recover from it not ...
Aaron Franke's user avatar
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Trouble with additional NIC: MSI MS250 PRO-VD + Logilink PC0029A

I recently changed Mobo/CPU/RAM on a PC where I used to have a dual-gigabit connection. With the previous configuration, using the integrated LAN controller and a LogiLink PC0029A PCI-e expansion ...
Patrick Roncagliolo's user avatar
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1 answer
155 views

My notebook Lenovo G780 lags. I use Linux Mint

I use Linux Mint 18.2 Sonya \n \l Here is my journalctl -b -p err: -- Logs begin at Thu 2017-10-05 17:07:22 MSK, end at Thu 2017-10-05 20:47:24 MSK Oct 05 17:07:22 ivan-Lenovo-G780 kernel: ata3: ...
ufulol's user avatar
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2 answers
2k views

Preference of COM2 vs COM1

I have a vague recollection from way back when that there was some kind of recommendation that one should connect ones modem to COM2 rather than any other COM port. I even more vaguelly recall that ...
janneb's user avatar
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What is the range of the legacy IRQs supplied by the motherboard? [closed]

What is the range of the legacy IRQs supplied by the motherboard? Between what and what? One hard review for me. 1 to 15 0 to 14 0 to 15 1 to 8
Mike Wentworth's user avatar
2 votes
0 answers
2k views

No irq handler for vector (irq -1)

I recently installed Centos 6.5, however, I am constantly flooded by messages like: Message from syslogd@localhost at May 18 15:38:34 ... kernel:do_IRQ: 0.123 No irq handler for vector (irq -1) I ...
bknagy's user avatar
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Bsod, irq_not_equal, can boot into safe mode

Windows 7 64 bit crashes to bsod, irq_not_equal. I can boot into safe mode but cannot uninstall programs. Error from repair computer on windows installation disc: Root cause found: Unspecified ...
mm865's user avatar
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1 vote
0 answers
120 views

Clarify misunderstanding about USB hosts and IRQs

I have a long-suffering usb sound card (Creative X-Fi HD). Its manual said the following: Ensure that the headset/soundcard uses a USB Host that is on an individual IRQ slot. This means that no ...
abyss.7's user avatar
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1 vote
2 answers
146 views

Frequent BSoD Windows 7

For the past week I have been getting BSoD on my Windows 7 home built PC. It's an old computer, I built it back in 2006 or 2007. I hadn't had trouble with it until now. I have BlueScreenView to ...
user2122059's user avatar
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1 answer
830 views

How to change IRQ priorities on Ubuntu?

I'm trying to figure out how to change the IRQ priorities for devices on Ubuntu (the specific release I have is 11.10). I found this question and answer which says it can be done, but it appears to ...
Ivan's user avatar
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9 votes
2 answers
16k views

PS/2 vs. USB keyboards: performance and energy consumption

As far as I know, PS/2 keyboards are interrupt driven, while USB are polled. Typically a PS/2 keyboard was assigned IRQ_1 on Windows. I'm not a hardware expert, but at a first glance it seems like the ...
Mister Smith's user avatar
19 votes
2 answers
6k views

Computer architecture: Are USB keyboards less responsive due to narrow IRQ range?

Here is a statement I just thought of. Can anyone tell me whether, and why, it is true? Statement: Because USB keyboards rely on a USB generic driver and architecture that has only access to lower ...
PPC's user avatar
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2 votes
1 answer
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IRQ's & interrupt vector table

I have been reading a lot about IRQs, and it seems there is conflicting and out of date information. Some of it dating back to Windows 95. Here is what I'm confused about. Are both software ...
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How to fix hard lockups (mentioning some IRQ) in my Eeepc laptop (running Linux)?

My EeePC 1015PEM tends to block sometimes (approximately once per 2 days). Even _ cursor in (modesetted) text mode does not blink. After rebooting (unless battery and adaptor was removed) it shows the ...
Vi.'s user avatar
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1 vote
0 answers
1k views

Serial port IRQ sharing on Linux

I was never able to use two serial ports for I/O on Linux that shared the same IRQ, although the serial driver has "IRQ sharing" enabled. Some BIOS simply don't have enough IRQs to give to each port, ...
nlucas's user avatar
  • 199
2 votes
4 answers
5k views

IRQ problem with 2.6.32/2.6.39 kernel on Debian Squeeze x86_64

I recently assembled a new computer so that all hardware is pretty new. Since then I've been experiencing some problem with IRQs when running Debian 6.0. On random occasions, usually after an hour or ...
MasterM's user avatar
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0 votes
1 answer
89 views

Are IRQs registers?

When a device is assigned an IRQ, does that mean that it has sole access to certain registers associated with that IRQ?
tony_sid's user avatar
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2 votes
2 answers
657 views

Can I use two of the same type of PCI Sound Cards in one computer?

I recently purchased two Rocketfish 5.1 PCI Sound Cards from Best Buy. These are going to be used for audio production and radio broadcasting, so one card can handle live audio, the other can handle ...
Eamon's user avatar
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3 votes
1 answer
730 views

Sound and Audio devices sharing IRQ numbers, high hardware interrupts, laggy video

After a fresh reinstall of Windows XP SP2, and re installation of my drivers from their official sites, my computer has been experiencing speed problems after a day or so of being on. After opening ...
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1 vote
2 answers
2k views

System says memory controller not available and doesn't boot?

Recently I have had a MainBoard-problem. I've send my mainboard to service and today I got it back from the company. It is a Foxconn 520a mainboard. Now I have installed my exchanged mainboard. But ...
Martin's user avatar
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