Package: nvidia-settings
Version: 1.0+20070502-1
Severity: normal
After some major system "upgrades" (switching RAM sticks, motherboard,
PSU, graphic cards and xservers) I found that nvidia-settings no
longer could auto-detect the optimal overclocking frequencies.
The "Auto Detect" button would always be greyed out even though I had
enabled "Coolbits" in Xorg.conf
I downgraded nvidia-settings to the version in testing
(1.0+20060516-3) and suddenly "Auto Detect" would be available.
After some further digging I think I found the bug;
The problem is that according NVCtrl.h (from nvidia-settings/testing)
NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION is a write-only attribute so
NvCtrlGetAttribute(..,NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION,..)
will always fail.
There should be a way to discover if the current card support optimal frequency
detection,
but trying to read a write-only attribute isn't the way. :)
Removing the attempted read of NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION
enables the "Auto Detect" button again.
I haven't checked if this is fixed in the upstream version.
I'll attach quick-and-dirty patch later
- the friendly but rusty hacker Mikael Åkersund
Quotes from relevent files below
File: nvidia-settings-1.0+20070502/src/gtk+-2.x/ctkclocks.c
Line 320:
if ( overclocking_enabled ) {
ret = NvCtrlGetAttribute(handle,
NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION,
&value);
if ( ret == NvCtrlSuccess ) { # <---- Will always fail
ret = NvCtrlGetAttribute(handle,
NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION_STATE,
&value);
if (
ret != NvCtrlSuccess )
return NULL;
probing_optimal =
(value ==
NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION_STATE_BUSY);
auto_detection_available = TRUE;
}
}
Here's a snip from /usr/include/NVCtrl/NVCtrl.h
[Line 1244]:
/*
* * NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION - set to _START to
* * initiate testing for the optimal 3D clock frequencies. Once
* * found, the optimal clock frequencies will be returned by the
* * NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS attribute asynchronously
* * (using an X event, see XNVCtrlSelectNotify).
* *
* * To cancel an ongoing test for the optimal clocks, set the
* * NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION attribute to _CANCEL
* *
* * Note: unless NV_CTRL_GPU_OVERCLOCKING_STATE is set to _MANUAL, the
* * optimal clock detection process is unavailable.
* */
#define NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION 95 /* -W- */
# <--- No reading!
#define NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION_START 0
#define NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION_CANCEL 1
--------------------------------------------
-- System Information:
Debian Release: lenny/sid
APT prefers testing
APT policy: (990, 'testing'), (140, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.22-4-d3-ul8-1
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages nvidia-settings depends on:
ii libatk1.0-0 1.20.0-1 The ATK accessibility toolkit
ii libc6 2.6.1-1 GNU C Library: Shared libraries
ii libcairo2 1.4.10-1+b2 The Cairo 2D vector graphics libra
ii libfontconfig1 2.4.2-1.2 generic font configuration library
ii libglib2.0-0 2.14.1-5 The GLib library of C routines
ii libgtk2.0-0 2.10.13-1 The GTK+ graphical user interface
ii libpango1.0-0 1.18.2-1 Layout and rendering of internatio
ii libx11-6 2:1.0.3-7 X11 client-side library
ii libxcursor1 1:1.1.9-1 X cursor management library
ii libxext6 1:1.0.3-2 X11 miscellaneous extension librar
ii libxfixes3 1:4.0.3-2 X11 miscellaneous 'fixes' extensio
ii libxi6 2:1.1.3-1 X11 Input extension library
ii libxinerama1 1:1.0.2-1 X11 Xinerama extension library
ii libxrandr2 2:1.2.2-1 X11 RandR extension library
ii libxrender1 1:0.9.4-1 X Rendering Extension client libra
Versions of packages nvidia-settings recommends:
ii nvidia-glx 100.14.19-1 NVIDIA binary Xorg driver
-- no debconf information
_________________________________________________________________
Explore the seven wonders of the world
http://search.msn.com/results.aspx?q=7+wonders+world&mkt=en-US&form=QBRE--- ctkclocks.c.orig 2007-10-21 21:29:28.000000000 +0200
+++ ctkclocks.c 2007-10-21 21:38:34.000000000 +0200
@@ -319,18 +319,13 @@
if ( overclocking_enabled ) {
ret = NvCtrlGetAttribute(handle,
- NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION,
- &value);
- if ( ret == NvCtrlSuccess ) {
- ret = NvCtrlGetAttribute(handle,
- NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION_STATE,
- &value);
- if ( ret != NvCtrlSuccess )
- return NULL;
- probing_optimal =
- (value == NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION_STATE_BUSY);
- auto_detection_available = TRUE;
- }
+ NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION_STATE,
+ &value);
+ if ( ret != NvCtrlSuccess )
+ return NULL;
+ probing_optimal =
+ (value == NV_CTRL_GPU_OPTIMAL_CLOCK_FREQS_DETECTION_STATE_BUSY);
+ auto_detection_available = TRUE;
}
/* Can we access the 2D clocks? */
