Interrupt stom on cardbus device

[Jakub Lach]

Hello.

I also had such problems with interrupt storm @ IRQ 16. Hardware is Lenovo
T400 (X4500,GM45) Patch greatly helped, although it  introduces other
problem. As long as output from glxgears is at ttyv0, it is working fine. I
output is @ xterm window, it stutters while writing the FPS count. If output
is at ttyv0 and I switch terminal from X11 to ttyv0 while glxgears is
working glxgears stutters too. 

dmesg

drm0: <Mobile IntelÂŽ GM45 Express Chipset> on vgapci0
info: [drm] MSI enabled 1 message(s)
vgapci0: child drm0 requested pci_enable_busmaster
info: [drm] AGP at 0xd0000000 256MB
info: [drm] Initialized i915 1.6.0 20080730
drm0: [ITHREAD]
error: [drm:pid26643:gm45_get_vblank_counter] *ERROR* trying to get vblank
count for disabled pipe 0
drm0: [ITHREAD]
drm0: [ITHREAD]
drm0: [ITHREAD]

best regards, 
Jakub Lach
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