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Old 06-30-09, 03:01 PM   #25
blue100
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

I just tried kernel 2.6.31-rc1, and the problem is still there. Can some nVidia guy (or girl) comment if this problem is recognized and being invested? Or do you need more info?
Thanks!
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Old 06-30-09, 05:22 PM   #26
majlo
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Hi!
I have idetical problem like blue100 on GeForce GO 7300 and 2.6.30-1 kernel from Debian Sid repo. When I run Compiz or KWin with OpenGL everything slow down.
I hope, it can be solve.
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Old 07-05-09, 07:49 AM   #27
mad.cow
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Have the same problem. After I start compiz, my desktop is so slow it is hard to use it.

All I can find in logs is this line:
Code:
NVRM: CPU does not support the PAT, falling back to MTRRs
nvidia 7400 go
kernel 2.6.30.1 (the same was with 26.30)
driver: 185.18.14


[UPDATE]
I enabled PAT in my kernel (2.6.30.1), as it was disabled, did not help
but strange is that same message appears in log file:
Code:
NVRM: CPU does not support the PAT, falling back to MTRRs
from my kernel config:
CONFIG_X86_PAT=y
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Old 07-05-09, 12:12 PM   #28
cdrw
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Quote:
Originally Posted by mad.cow View Post
Have the same problem. After I start compiz, my desktop is so slow it is hard to use it.

All I can find in logs is this line:
Code:
NVRM: CPU does not support the PAT, falling back to MTRRs
nvidia 7400 go
kernel 2.6.30.1 (the same was with 26.30)
driver: 185.18.14


[UPDATE]
I enabled PAT in my kernel (2.6.30.1), as it was disabled, did not help
but strange is that same message appears in log file:
Code:
NVRM: CPU does not support the PAT, falling back to MTRRs
from my kernel config:
CONFIG_X86_PAT=y
read my last post here:
http://www.nvnews.net/vbulletin/showthread.php?t=135157

I don't think that anyone is interested in fixing the problem.
PAT has definitely a bug in kernel because enabled or not in the config file it is still invoked (and fail).
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Old 07-05-09, 01:39 PM   #29
zander
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Thank you for your bug reports. I took a closer look and filed a bug to identify and implement the best possible workaround for the regression introduced by H. Peter Anvin's change (the kernel's approach of forcing potential PAT users back to MTRRs on the CPUs in question is not optimal) and the CPU erratum it was prompted by.

If the NVIDIA Linux graphics driver used to work fine on your system prior to installing e.g. Linux 2.6.30 (i.e. did not report that your CPU does not feature PAT support, and performed as expected), you can try using the patch below. You can use the .run installer's --apply-patch command line option to apply the patch:
--apply-patch [Patch]
Apply the patch 'Patch' to the kernel interface files included
in the .run file, remove any precompiled kernel interfaces
and then repackage the .run file. The new .run file will be
placed in the current directory and the string "-custom"
appended to its name, unless already present, to distinguish it
from the original .run file.
Please note: this patch is not fit for inclusion in third-party NVIDIA driver packages.
Attached Files
File Type: txt NVIDIA_kernel-185.18.14-572433.diff.txt (598 Bytes, 890 views)
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Old 07-05-09, 02:42 PM   #30
blue100
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Quote:
Originally Posted by zander View Post
Thank you for your bug reports. I took a closer look and filed a bug to identify and implement the best possible workaround for the regression introduced by H. Peter Anvin's change (the kernel's approach of forcing potential PAT users back to MTRRs on the CPUs in question is not optimal) and the CPU erratum it was prompted by.

If the NVIDIA Linux graphics driver used to work fine on your system prior to installing e.g. Linux 2.6.30 (i.e. did not report that your CPU does not feature PAT support, and performed as expected), you can try using the patch below. You can use the .run installer's --apply-patch command line option to apply the patch:
--apply-patch [Patch]
Apply the patch 'Patch' to the kernel interface files included
in the .run file, remove any precompiled kernel interfaces
and then repackage the .run file. The new .run file will be
placed in the current directory and the string "-custom"
appended to its name, unless already present, to distinguish it
from the original .run file.
Please note: this patch is not fit for inclusion in third-party NVIDIA driver packages.
Works fine here on 2.6.30 :-). Thanks!
Do you know when this fix will make it to an official (beta/pre)release? Because the packages available on Launchpad in a PPA are built automatically for each kernel, and thus is is easier to switch between kernels. (If I understand correctly, the .run packages from nVidia can only be installed for one kernel at a time.)
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Old 07-05-09, 03:40 PM   #31
zander
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

@blue100: unfortunately, I can't say when a complete fix will be available in a BETA/pre-release driver. I have a good idea of what needs to be done, but there currently are higher-priority items on my TODO list.
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Old 07-05-09, 03:43 PM   #32
zander
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

@blue100: BTW, you can install kernel modules for multiple modules using the .run installer using the --kernel-module-only command line option; from the `nvidia-installer` manual page:
-K, --kernel-module-only
Install a kernel module only, and do not uninstall the existing driver. This is
intended to be used to install kernel modules for additional kernels (in cases where
you might boot between several different kernels). To use this option, you must
already have a driver installed, and the version of the installed driver must match the
version of this kernel module.
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Old 07-05-09, 03:56 PM   #33
blue100
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Quote:
Originally Posted by zander View Post
@blue100: unfortunately, I can't say when a complete fix will be available in a BETA/pre-release driver. I have a good idea of what needs to be done, but there currently are higher-priority items on my TODO list.
Well, I'm happy it is at your TODO list (although not with the highest priority). ';m looking forward to that release, and this patch makes waiting much easier :-).
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Old 07-05-09, 04:25 PM   #34
cdrw
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

fantastic,
your patch worked for me too (I described my problems here: http://www.nvnews.net/vbulletin/showthread.php?t=135157 ).

it also works with 2.6.30.1

Thank you very much zander
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Old 07-05-09, 04:48 PM   #35
mad.cow
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

zander, you are my star

It works for me too! Thank you so much! great work!

(debian, custom 2.6.30.1 kernel, geforce 7400 go)
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Old 07-05-09, 06:39 PM   #36
riverdragon
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Default Re: Jaunty + 2.6.30rc[4,5,6] = very slow Compiz

Works here, too! Thanks!
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