Re: do_IRQ: 0.83/0.84 No irq handler for vector

From: Nikos Chantziaras
Date: Sun Jul 27 2008 - 16:20:23 EST


Robert Hancock wrote:
Nikos Chantziaras wrote:
Nikos Chantziaras wrote:
Kernel 2.6.26 (on x86-64) gives "do_IRQ: 0.83 No irq handler for vector" (and "do_IRQ: 0.83", but less often) warnings periodically.

I changed the kernel config:

- CONFIG_PCI_MSI=y
+ # CONFIG_PCI_MSI is not set

In other words I disabled Message Signaled Interrupt support. Now instead of "do_IRQ: 0.83 No irq handler for vector" I get:

+------ PCI-Express Device Error ------+
Error Severity : Uncorrected (Non-Fatal)
PCIE Bus Error type : Transaction Layer
Flow Control Protocol : First
Receiver ID : 0010
VendorID=1106h, DeviceID=a208h, Bus=00h, Device=02h, Function=00h
Broadcast error_detected message
Broadcast mmio_enabled message
Broadcast resume message
AER driver successfully recovered

(Repeated as many times as the "do_IRQ" message previously.)

In case someone needs it, this is my complete dmesg:

http://realnc.pastebin.com/d6534029

and this is the kernel configuration: http://bugs.freedesktop.org/attachment.cgi?id=17912

My guess is some device is that some device is generating MSI interrupts without any handler being registered for it, and with MSI support disabled it now generates a master abort instead. Most likely whatever device is connected to the Bus=00h, Device=02h, Function=00h bridge. Can you post "lspci -vv" output?

The device in question is my graphics card (an AMD/ATI Radeon X1950XT PCI-e):

02:00.0 VGA compatible controller: ATI Technologies Inc R580 [Radeon X1900] (prog-if 00 [VGA controller])
02:00.1 Display controller: ATI Technologies Inc Unknown device 7264

02:00.1 should be the card's second head I guess?

Here's the complete lspci -vv: http://realnc.pastebin.com/m6ac97572

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