IRQ disabled?

The_Great_Sephiroth · Posted: Sun Aug 26, 2018 4:47 am Post subject: IRQ disabled?

I was working with certificates in a console window in Plasma when this popped up in the console window.

The_Great_Sephiroth · Posted: Mon Sep 03, 2018 2:45 am Post subject:

I am still not sure what caused this. It may have been due to a weak charge (battery getting low), but I verified that IRQ16 is indeed, the video card. When it disables, framerates drop into the sewer. Is there a way to tell the kernel to not disable my video card even when on low power?
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Jaglover · Posted: Mon Sep 03, 2018 10:34 am Post subject:

Why you think kernel disables the IRQ? IRQ is in hardware, kernel cannot use it if it gets disabled.
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P.Kosunen · Guru Joined: 21 Nov 2005 Posts: 309 Location: Finland

Do you have "options i2c-i801 disable_features=0x10" set under /etc/modprobe.d/?

The_Great_Sephiroth · Posted: Mon Sep 03, 2018 10:05 pm Post subject:

Unless it is set by default, I do not have it set. I have never had to mess with IRQ settings before.

Jag, I believe it is the kernel due to the message in my first post. I'm chilling there and then "9y84mj1 kernel: [17131.992007] Disabling IRQ #16" pops up. You know, it even says "kernel" sent the message, so if the kernel did not disable the IRQ as the message states, then I am thoroughly confused!
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Jaglover · Posted: Mon Sep 03, 2018 10:15 pm Post subject:

It may be, but it is also possible kernel is merely letting you to know the IRQ has been disabled in hardware.
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The_Great_Sephiroth · Posted: Wed Sep 05, 2018 3:44 pm Post subject:

Well, prior to using Debian and after that, Gentoo on this system, Windows never had the issue. This is indeed the first time it happened even in Linux, but only after a recent update. I imagine something changed to conserve power and it doesn't like doing that on my system. Either way, how do I troubleshoot or resolve this issue?
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Jaglover · Posted: Thu Sep 06, 2018 2:15 pm Post subject:

Hardware ages, what was working yesterday may not work tomorrow.
There are debug options in kernel, enabling debug produces more verbose kernel log.
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The_Great_Sephiroth · Posted: Thu Sep 06, 2018 3:32 pm Post subject:

This isn't hardware, I am 99.9% sure of that. I don't want to change my kernel for this, I just want to figure out what does it. If I need a debug kernel and all that, it isn't worth messing with. I actually use this system. Quite heavily, in fact.

I did just do a new search with a few words changed and apparently this is an old issue. It's all over the place. Doubt it is my hardware due to this. Will search more when time permits.
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tholin · Apprentice Joined: 04 Oct 2008 Posts: 204

CooSee · Veteran Joined: 20 Nov 2004 Posts: 1468 Location: Earth

did you try with any other live-cd, if this still exist ?
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Ant P. · Watchman Joined: 18 Apr 2009 Posts: 6920

This isn't hardware failure. The intel graphics driver isn't great, it's been this way for a long time. One of the workarounds they added many years ago is a hang detector that forces it into dumb framebuffer mode instead of crashing entirely, that's what's happening in this case. No idea what the cause is, but rebooting will fix it. Or maybe power-cycling the hardware - try suspending?

Sometimes the cure is worse than the disease, though; this used to be a daily occurrence on my netbook around 2011-12, but I barely noticed when it happened because I run Openbox and the GPU was already slow. Running KDE's compositor without 3D acceleration is going to sting.

The_Great_Sephiroth · Posted: Sat Sep 08, 2018 11:18 pm Post subject:

I believe Ant hit the nail on the head. This was indeed my graphics card. After I got hibernation working I was hibernating it or suspending it all week between client locations. Basically, I'd suspend it, drive to wherever, wake it up, work, and repeat. At the end of the day I'd suspend it so I could pick up where I left off Monday. I started it up one Monday and after about ten minutes it did this. My guess is that the driver had been "up" for too long and screwed up. Will try this again to see if it is reproducible. If it is, I can narrow it down to the driver not liking to be loaded all week. It has not done this since, but I am also back to shutting down every day.
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The_Great_Sephiroth · Posted: Sat Sep 15, 2018 2:13 am Post subject:

Just following up here. It happened AGAIN. I was in Plasma and I only had VirtualBox open (DOS 6.22 w/WFW3.11) and Chromium. Suddenly DOS got slow (DOS was NEVER slow) and when I went back to Plasma, slow as heck. I shutdown the VM and rebooted and when the desktop disappeared and it went to the shell, I saw it had disabled IRQ #16 again.

This is most likely a kernel issue at this point. I did NOT have this issue in 4.14.52, but it is rampant in 4.14.65. I imported the old configuration with "make oldconfig" as always, so it is an identical configuration. Not sure what it is, but something in the new kernel is flaky.
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tholin · Apprentice Joined: 04 Oct 2008 Posts: 204

The_Great_Sephiroth · Posted: Fri Sep 21, 2018 2:06 am Post subject:

It is an older Dell latitude E6400 system off the top of my head. Core2Duo, 8GB RAM, 1TB SATA2 disk, DVD-RAM drive, smart-chip reader, the whole nine yards. Next time I use it I will post the specifics. I use the i965 driver.
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tholin · Apprentice Joined: 04 Oct 2008 Posts: 204

https://www.cnet.com/products/dell-latitude-e6400-14-1-core-2-duo-p8700-vista-business-xp-pro-downgrade-2-gb-ram-160-gb-hdd-series/specs/

According to this site the Dell latitude E6400 use an Intel GMA 4500MHD which is an i965/g4x (fourth generation IGPU) so that patch is active. Try reverting it an see if the problem goes away.

The_Great_Sephiroth · Posted: Fri Sep 21, 2018 8:59 pm Post subject:

I'm not hot-plugging though. I rarely use a second monitor these days and I rely on the one on the laptop itself 99% of the time.
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Maitreya · Guru Joined: 11 Jan 2006 Posts: 445

The_Great_Sephiroth · Posted: Sun Sep 23, 2018 5:06 pm Post subject:

That could possibly be it, except the most recent occurrence happened without any lid action going on. It simply disabled the IRQ while I was working with a virtual machine.
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