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 ...
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231 views
What is Microsoft ACPI-Compliant System and why are there so many IRQs for it?
I' m a Windows newbie because most of my time I use Linux systems so this question may seem stupid.
As far as i know there are only 16 IRQs (0-15) and it is chipset - dependent (APIC controller).But ...
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1answer
87 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 ...
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2answers
965 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 no hardware expert, but at a first glance seems like the PS/2 ...
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577 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 ...
2
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1answer
472 views
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I have been reading a lot about IRQs, and it seems there is conflicting and out of date information.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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400 views
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 ...
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337 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, ...
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4answers
3k 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 ...
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42 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?
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2answers
170 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 ...
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1answer
494 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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677 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 ...
