[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: kern/46596 (ehci interrupt storm triggered by VGA interrupt)
The following reply was made to PR kern/46596; it has been noted by GNATS.
From: Andreas Gustafsson <gson%gson.org@localhost>
To: =?iso-8859-2?Q?Jarom=EDr_Dole=E8ek?= <jaromir.dolecek%gmail.com@localhost>
Cc: "gnats-bugs\@NetBSD.org" <gnats-bugs%netbsd.org@localhost>
Subject: Re: kern/46596 (ehci interrupt storm triggered by VGA interrupt)
Date: Wed, 17 Jun 2020 12:07:18 +0300
I dug out the machine from storage and connected a VGA display using a
passive DVI/VGA adapter plugged into the motherboard DVI port. My
test consists of starting a "vmstat 1" and unplugging/replugging the
adapter from the motherbord DVI port.
I was unable to reproduce the bug using a -current USB live image, so
apparently it has already been fixed, and as a result, I can't
meaningfully test your patch.
To narrow down the timeframe of the fix, I tried booting a couple of
old install CDs and breaking out of sysinst to a shell to run the
test. With a 6.1.5 CD, I could reproduce the bug (the vmstat
interrupt column started showing 200000+ interrupts per second), but
with a 7.1 install CD, I could not. Instead, the following kernel
message was printed:
drm: HPD interrupt storm detected on connector HDMI-A-1: switching from hotplug detection to polling
With the -current live image, there is neither an interrupt store nor
a kernel message.
Andreas Gustafsson, gson%gson.org@localhost
Main Index |
Thread Index |