Red Hat Bugzilla – Bug 441644
Kernel AGP driver causes hibernation faiilure with nvidia-96xx
Last modified: 2009-01-09 01:21:30 EST
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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:188.8.131.52) Gecko/20080325 Fedora/184.108.40.206-1.fc8 Firefox/220.127.116.11
Description of problem:
I'm using Fedora 8 and I want to hibernate.
Without nvidia-96xx-kmod and related RPMS it works fine.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. yum install kmod-nvidia-96xx
2. try to hibernate
With nvidia-96xx-kmod (kmod-nvidia-96xx ?) the hibernate part seems no different than before, but when I try to resume the resume cycle seems to complete, the laptop display backlight comes on and then the caps-lock light stops responding to key presses.
The hard disk light indicates activity but nothing is displayed and even the laptop power-off button doesn't power the system down - holding it down for 5 seconds powers off the machine.
Expected hibernation behavior
With the kernel command line option vga=791 in grub, the hibernate cycle doesn't complete - the machine doesn't seem to get to the saving ram to disk part - it just freezes.
I checked upstream with nvidia and found http://www.nvnews.net/vbulletin/showthread.php?t=58498
It gave me the hint to set NvAGP to "0" in xorg.conf - it worked, but as this turns off use of the AGP port, 3D animation was choppy.
I then tried Option NvAGP "1" and that worked too. Problem solved!
I haven't tried vga=791 again in case it breaks things.
So it looks like the problem lies with the Kernel's AGP drivers.
For what it's worth the kernel AGP driver seemed faster.
Also when the resume cycle completed, the "science" screensaver doesn't show the desktop background - I guess it wasn't saved - a minor quibble.
The reason why the kernels AGP is faster is because NvAGP wasn't enabled
# cat /proc/driver/nvidia/agp/status
revealed that it was disabled.
Adding "agp=off" to the kernel boot parameter enables it - hibernate still works.
The science screen-saver still occasionally misbehaves.
Enabling compiz-fusion wreaks havoc on resume from suspend - it crashed KDE.
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