Description of problem: Whenever i try to activate compositing on KDE 4.1 i receive a message from syslog saying that irq #16 was disabled. After that, screen updates only occurs after I move my mouse. Indeed it's seems computer processing stops and only resume after i move my mouse, generating interruptions. I think it's related to 3D acceleration 'cause if i use wine to run War Craft with '-opengl' option i also get the same effect. In game i have to move my mouse to resume playing.


Version-Release number of selected component (if applicable): This problem started on kernel 2.6.27.5-101. I also noticed it on 2.6.27.5-109 and 2.6.27.5-113. Today updates removed my last kernel which used to work without problems. I don't annotated the version :(, i use to update regularly, if you take the version right before 2.6.27.5-101, maybe that's the one that used to work here. Besides this I'm running:

xorg-x11-server-Xorg-1.5.3-5.fc10.x86_64;
xorg-x11-drv-i810-2.5.0-3.fc10.x86_64;
mesa-dri-drivers-7.2-0.13.fc10.x86_64
mesa-libGLU-7.2-0.13.fc10.i386
mesa-libGL-7.2-0.13.fc10.x86_64
mesa-libGLU-7.2-0.13.fc10.x86_64
mesa-libGL-7.2-0.13.fc10.i386


How reproducible: It's seems related to 3D acceleration, so use any any 3D application or try to activate compositing and bam! IRQ #16 is disabled and system start to work only when input interruptions (mouse and keyboard) are generated. I have only kde 4.1 so can't test on gnome, maybe it's related to kwin.



Steps to Reproduce:
1. Enable desktop effect or run 'wine warIII.exe -opengl'
2. Get message saying IRQ #16 was disabled
3. Use you mouse or the keyboard to keep the computer working
  
Actual results: The computer freezes while no interruption is generated.


Expected results: I suspect i should be able to run the game or activate the desktop effects without problems.

Additional info: 
# cat /proc/interrupts

           CPU0       CPU1
  0:    1292704    1178067   IO-APIC-edge      timer
  1:       5067       1163   IO-APIC-edge      i8042
  8:          0          1   IO-APIC-edge      rtc0
  9:          1          3   IO-APIC-fasteoi   acpi
 12:      47276     345187   IO-APIC-edge      i8042
 14:      22396      22272   IO-APIC-edge      ata_piix
 15:          0          0   IO-APIC-edge      ata_piix
 16:    3405635    3394366   IO-APIC-fasteoi   i915@pci:0000:00:02.0
 17:      15572     145509   IO-APIC-fasteoi   ahci, eth0, iwl3945
 18:       7951        114   IO-APIC-fasteoi   mmc0
 19:         55         13   IO-APIC-fasteoi   firewire_ohci
 20:       4375      20724   IO-APIC-fasteoi   ehci_hcd:usb2, uhci_hcd:usb3, uhci_hcd:usb5
 21:       2625        148   IO-APIC-fasteoi   uhci_hcd:usb4, uhci_hcd:usb6, HDA Intel
 22:          0          0   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb7
NMI:          0          0   Non-maskable interrupts
LOC:    1302608    1571956   Local timer interrupts
RES:     673359     534204   Rescheduling interrupts
CAL:        460       6863   function call interrupts
TLB:        923        723   TLB shootdowns
TRM:          0          0   Thermal event interrupts
THR:          0          0   Threshold APIC interrupts
SPU:          0          0   Spurious interrupts
ERR:          0

# tail -f -n20 /var/log/messages

Nov 19 00:49:53 r2d2 kernel: usb 5-1: USB disconnect, address 2
Nov 19 01:02:08 r2d2 kernel: irq 16: nobody cared (try booting with the "irqpoll" option)
Nov 19 01:02:08 r2d2 kernel: Pid: 0, comm: swapper Not tainted 2.6.27.5-113.fc10.x86_64 #1
Nov 19 01:02:08 r2d2 kernel:
Nov 19 01:02:08 r2d2 kernel: Call Trace:
Nov 19 01:02:08 r2d2 kernel: <IRQ>  [<ffffffff8108320f>] __report_bad_irq+0x38/0x7c
Nov 19 01:02:08 r2d2 kernel: [<ffffffff8108345b>] note_interrupt+0x208/0x26d
Nov 19 01:02:08 r2d2 kernel: [<ffffffff81083b88>] handle_fasteoi_irq+0xbb/0xeb
Nov 19 01:02:08 r2d2 kernel: [<ffffffff8101309e>] do_IRQ+0xf7/0x169
Nov 19 01:02:08 r2d2 kernel: [<ffffffff81010933>] ret_from_intr+0x0/0x2e
Nov 19 01:02:08 r2d2 kernel: <EOI>  [<ffffffff811bcc5a>] ? acpi_idle_enter_simple+0x175/0x1b4
Nov 19 01:02:08 r2d2 kernel: [<ffffffff811bcc52>] ? acpi_idle_enter_simple+0x16d/0x1b4
Nov 19 01:02:08 r2d2 kernel: [<ffffffff81286063>] ? cpuidle_idle_call+0x95/0xc9
Nov 19 01:02:08 r2d2 kernel: [<ffffffff8100f279>] ? cpu_idle+0xb2/0x10b
Nov 19 01:02:08 r2d2 kernel: [<ffffffff8131f33d>] ? rest_init+0x61/0x63
Nov 19 01:02:08 r2d2 kernel:
Nov 19 01:02:08 r2d2 kernel: handlers:
Nov 19 01:02:08 r2d2 kernel: [<ffffffffa03a246f>] (i915_driver_irq_handler+0x0/0x199 [i915])
Nov 19 01:02:08 r2d2 kernel: Disabling IRQ #16
Nov 19 01:17:52 r2d2 kernel: CE: hpet increasing min_delta_ns to 22500 nsec

Maybe it's relate to the first line of the previous block. The one stating that an USB device was disconnected. I didn't disconnected anything from my notebook, anyway here is the output of lsusb:

# lsusb

Bus 002 Device 003: ID 05a9:2640 OmniVision Technologies, Inc.       
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub       
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub       
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

That device is a embedded webcam. I already noted the sometimes the webcam led blinks as something was probing something. The webcam doesn't work on kopete or flash player for example. Indeed i don't have any program installed that correctly uses my webcam.

Don't know what else i can provide, but if you ask, i will.