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From: "Jiri Slaby" <xslaby@fi.muni.cz>
Date: Sun, 15 Jan 2006 18:11:35 +0100
To: linux-kernel@vger.kernel.org
Subject: spurious 8259A interrupt: IRQ7
Message-Id: <20060115171134.94B7B22AEFB@anxur.fi.muni.cz>
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Hello,

I have this problem with irq 7. There are many ERR interrupts as you can see in
the table below.
Count of errorneous is similar to count of radeon interrupts (since start of
system).
It appears in all kernels I tried (since 2.6.11.7).
           CPU0       
  0:     367164          XT-PIC  timer
  1:       2397          XT-PIC  i8042
  2:          0          XT-PIC  cascade
  5:       5355          XT-PIC  ATI IXP, eth0
  8:          1          XT-PIC  rtc
  9:        163          XT-PIC  acpi
 10:      25595          XT-PIC  ehci_hcd:usb1, ohci_hcd:usb2, ohci_hcd:usb3
 11:      85385          XT-PIC  radeon@pci:0000:01:05.0
 12:       4991          XT-PIC  i8042
 14:       8576          XT-PIC  ide0
 15:      12774          XT-PIC  ide1
NMI:          0 
LOC:     367136 
ERR:      82119
MIS:          0

without running X, there is no ERR (and also no irq 11).
Card:
01:05.0 VGA compatible controller: ATI Technologies Inc RS300M AGP [Radeon Mobility 9100IGP] (prog-if 00 [VGA])
        Subsystem: ASUSTeK Computer Inc.: Unknown device 1902
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 64 (2000ns min), Cache Line Size 10
        Interrupt: pin A routed to IRQ 11
        Region 0: Memory at e8000000 (32-bit, prefetchable) [size=64M]
        Region 1: I/O ports at d000 [size=256]
        Region 2: Memory at fda00000 (32-bit, non-prefetchable) [size=64K]
        Expansion ROM at fd900000 [disabled] [size=128K]
        Capabilities: [58] AGP version 3.0
                Status: RQ=256 Iso- ArqSz=0 Cal=7 SBA+ ITACoh- GART64- HTrans- 64bit+ FW+ AGP3+ Rate=x4,x8
                Command: RQ=32 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x8
        Capabilities: [50] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

regards,
--
Jiri Slaby         www.fi.muni.cz/~xslaby
~\-/~      jirislaby@gmail.com      ~\-/~
B67499670407CE62ACC8 22A032CC55C339D47A7E
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