[Nouveau] [Bug 112070] H/W Acceleration sufficiently buggy on Debian to hard lock machine GeForce 7600 GO

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=112070

--- Comment #27 from Doobz <dooby.dave at virgin.net> ---
I've been looking at the interrupts, and pretty sure something is amiss. nvkm
does tick away quite rapidly 50+/sec, but it's by no means the worst.

cat /proc/interrupts 
           CPU0       CPU1       
  0:     884041          0   IO-APIC   2-edge      timer
  1:        943          0   IO-APIC   1-edge      i8042
  8:          0          1   IO-APIC   8-edge      rtc0
  9:          0      71944   IO-APIC   9-fasteoi   acpi
 12:          0     407479   IO-APIC  12-edge      i8042
 14:      15003          0   IO-APIC  14-edge      ata_piix
 15:          0          0   IO-APIC  15-edge      ata_piix
 16:       4422          0   IO-APIC  16-fasteoi   yenta, uhci_hcd:usb5
 17:          0          0   IO-APIC  17-fasteoi   mmc0, mmc1
 18:          0        184   IO-APIC  18-fasteoi   uhci_hcd:usb4
 19:          0          0   IO-APIC  19-fasteoi   uhci_hcd:usb3, i801_smbus
 20:          0          2   IO-APIC  20-fasteoi   firewire_ohci
 23:          0          3   IO-APIC  23-fasteoi   uhci_hcd:usb1, ehci_hcd:usb2
 29:      89581      51828   PCI-MSI 524288-edge      nvkm
 30:          0        518   PCI-MSI 442368-edge      snd_hda_intel:card0
 31:      54496      31631   PCI-MSI 2621440-edge      iwl3945
 32:          0          3   PCI-MSI 2097152-edge      enp4s0
NMI:          7          8   Non-maskable interrupts
LOC:     117697     732513   Local timer interrupts
SPU:          0          0   Spurious interrupts
PMI:          7          8   Performance monitoring interrupts
IWI:     157032     144987   IRQ work interrupts
RTR:          0          0   APIC ICR read retries
RES:      99916     105307   Rescheduling interrupts
CAL:      43819      44884   Function call interrupts
TLB:      93370      93058   TLB shootdowns
TRM:          0          0   Thermal event interrupts
THR:          0          0   Threshold APIC interrupts
DFR:          0          0   Deferred Error APIC interrupts
MCE:          0          0   Machine check exceptions
MCP:          9          9   Machine check polls

This was after 45mins.

I was chasing interrupt issues on windows on this laptop. Never got it sussed.
It was fine in safe mode, but not booted normally.

Looking at the desktop(hp gf7100), it has no massive number on line 0 timer,
and no acpi ones either. Nvkm is ticking at similar rate to laptop, but there
is one line going up faster. Ill leave it on for a similar time and post it
here for comparison.

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