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Old 06-03-09, 05:48 PM   #13
blue100
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

As you said, I opened another bug report. There, I solved the problem and I was able to produce a correct bug report:
  • I booted with 2.6.30rc8
  • I went to tty1 and stopped gdm and started the X server
  • I enabled the desktop effects, and the bad performance started
  • As the terminal window was not updated, I disabled the desktop effects (and my computer was back to normal behavior).
  • In a terminal, I ran the nvidia bug report tool. See attachment.

Hopefully, this bug report explains my problems and I hope it can be solved.
Attached Files
File Type: gz nvidia-bug-report.log.gz (41.8 KB, 133 views)
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Old 06-04-09, 06:30 AM   #14
NvFuchs
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Well, the only thing I see in the Bug Report is

Jun 4 00:15:28 ernstblaauw-laptop kernel: [ 10.853727] NVRM: CPU does not support the PAT, falling back to MTRRs.

this one.

Are you still using the nopat option? If so, then this is the cause for this message. As there are no other problems (neither in the Xorg log nor XID messages in the kernel log) I suspect this either being a problem with compiz (ubuntu package or in general) or the kernel (ubuntu package or general)

Maybe somebody from nvidia finds something I didn't see.

Fuchs
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Old 06-04-09, 06:43 AM   #15
blue100
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Quote:
Originally Posted by NvFuchs View Post
Well, the only thing I see in the Bug Report is

Jun 4 00:15:28 ernstblaauw-laptop kernel: [ 10.853727] NVRM: CPU does not support the PAT, falling back to MTRRs.

this one.

Are you still using the nopat option? If so, then this is the cause for this message. As there are no other problems (neither in the Xorg log nor XID messages in the kernel log) I suspect this either being a problem with compiz (ubuntu package or in general) or the kernel (ubuntu package or general)

Maybe somebody from nvidia finds something I didn't see.

Fuchs
I'm not using the nopat option, so that's not the cause for this message. Could it be the problem?

As the kernel is not 'tuned' for Jaunty, it is possible there is some problem with the combination 2.6.30rc8 and Jaunty, whch will not occur in the next version of Ubuntu.
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Old 06-04-09, 07:05 AM   #16
NvFuchs
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Quote:
Originally Posted by blue100 View Post
I'm not using the nopat option, so that's not the cause for this message. Could it be the problem?

As the kernel is not 'tuned' for Jaunty, it is possible there is some problem with the combination 2.6.30rc8 and Jaunty, whch will not occur in the next version of Ubuntu.
It might be the cause of the problem, yes.

Please also note, that nvidia does not officially support development series kernels, and 2.6.30rc8 is a release candidate, therefore not a supported kernel.
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Old 06-11-09, 09:20 AM   #17
blue100
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Default Re: Jaunty + 2.6.30 = very slow Compiz

Quote:
Originally Posted by NvFuchs View Post
It might be the cause of the problem, yes.

Please also note, that nvidia does not officially support development series kernels, and 2.6.30rc8 is a release candidate, therefore not a supported kernel.
Well, I just installed the 2.6.30 kernel, which is supported. As I expected, this did not solve th eproblem I had with the rc's.

Is there anything I can do to help solve the problem, or at least track the problem down to a specific point? Maybe now the problem also exists in a supported kernel,I can do additional tests?
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Old 06-12-09, 01:54 AM   #18
Lithorus
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Default Re: Jaunty + 2.6.30 = very slow Compiz

Quote:
Originally Posted by blue100 View Post
Well, I just installed the 2.6.30 kernel, which is supported. As I expected, this did not solve th eproblem I had with the rc's.

Is there anything I can do to help solve the problem, or at least track the problem down to a specific point? Maybe now the problem also exists in a supported kernel,I can do additional tests?
Did you ever try adding the nopat option? And how did you try it? It's added to the kernel startup line. Then grub starts, press 'e' to edit the current selected grub item. Select the 'kernel' line and add nopat to the end, like this :
Code:
kernel          /boot/vmlinuz-2.6.30-020630-generic root=UUID=d23a3e62-4ffd-4733-99e3-497d4c8ba2a3 ro quiet nopat
If you want it to stick on every boot, find the
Code:
# defoptions=quiet
line in /boot/grub/menu.lst add nopat and run update-grub to let it update all the grub entries.

Also it would be good if you could attach a bug report from a boot where the nopat option is added.
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Old 06-12-09, 08:00 AM   #19
blue100
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Earlier, I tried the nopat option, but it didn't make a difference. However, my previous bug report is made on a boot without nopat, so today, I made a new bug report on the 2.6.30 kernel with the nopat option.
Attached you'll find the log. First, I tried to make the log on tty2, but there, it did not finish. So, I stopped the process with ctrl-z and with some troubles I was able to type the correct command in yakuake. This time, the nvidia bug report tool did succeed. I attached both reports. The 'old' one is the first attempt.
Attached Files
File Type: gz nvidia-bug-report.log.gz (34.0 KB, 95 views)
File Type: gz nvidia-bug-report.log.old.gz (23.9 KB, 111 views)
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Old 06-16-09, 05:52 AM   #20
blue100
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

I made a movie, so ou can see what's going wrong (I find it hard to describe the exact problem).
It on Youtube. Click here.

Hopefully, this enables you to fully understand the problem.
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Old 06-16-09, 07:33 AM   #21
adamk75
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Do you have the "Force synchronization between X and GLX" option enabled in the workarounds plugin in ccsm?

Adam
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Old 06-16-09, 08:14 AM   #22
blue100
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Quote:
Originally Posted by adamk75 View Post
Do you have the "Force synchronization between X and GLX" option enabled in the workarounds plugin in ccsm?

Adam
Thanks for your suggestion .
No, it was not enabled. However, I just enabled it and it makes no difference.

Besides, today I tried kernel 2.9.29.5, and this kernel is working. So, for my configuration, somewhere between 2.9.29 and 2.9.30 it broke.

Last edited by blue100; 06-16-09 at 11:38 AM. Reason: Update info
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Old 06-19-09, 03:09 AM   #23
riverdragon
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Hi, I'm a new user.
I have the same problem as blue100, I'm using gentoo, I have a geforce go 7400.

I did a git-bisect to find out which particular kernel patch is the cause for this behaviour, and this is the result:

Quote:
75a048119e76540d73132cfc8e0fa0c0a8bb6c83 is first bad commit
commit 75a048119e76540d73132cfc8e0fa0c0a8bb6c83
Author: H. Peter Anvin <hpa@linux.intel.com>
Date: Thu Jan 22 16:17:05 2009 -0800

x86: handle PAT more like other CPU features

Impact: Cleanup

When PAT was originally introduced, it was handled specially for a few
reasons:

- PAT bugs are hard to track down, so we wanted to maintain a
whitelist of CPUs.
- The i386 and x86-64 CPUID code was not yet unified.

Both of these are now obsolete, so handle PAT like any other features,
including ordinary feature blacklisting due to known bugs.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

:040000 040000 797f3c5ac48ae28779466500f56d74087356cda8 735eebc5f228ba78a377a5c27f33d8f7a51aba8e M arch
Now I'm going to open a bug on gentoo bugzilla, I'd like to know if I should open a bug on kernel bugzilla, too: I know they don't like reports about nvidia drivers, so if nvidia knows how to fix this bug I won't need to.
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Old 06-26-09, 05:07 AM   #24
blue100
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Quote:
Originally Posted by riverdragon View Post
Hi, I'm a new user.
I have the same problem as blue100, I'm using gentoo, I have a geforce go 7400.

I did a git-bisect to find out which particular kernel patch is the cause for this behaviour, and this is the result:

Now I'm going to open a bug on gentoo bugzilla, I'd like to know if I should open a bug on kernel bugzilla, too: I know they don't like reports about nvidia drivers, so if nvidia knows how to fix this bug I won't need to.
nVidia, is there some news about this problem? As user riverdragon has tracked down this problem to a patch, it should be much easier to solve this bug, I think.
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