Vgaswitcheroo, /sys/kernel/debug/vgaswitcheroo is missing

Hi all,
I'm having troubles disabling my discrete graphics card (an ATI Radeon). I already tried this guide, but after completing all the steps (including mounting the debugfs) /sys/kernel/debug/vgaswitcheroo still doesn't appear.
/proc/config.gz does have CONFIG_VGA_SWITCHEROO=y
The list of things I did to help this:
Downgrading the xf86-video-ati driver
Downgrading the linux kernel (I actually have two of them, 3.0.30-2-lts and 3.0.34-1-lts)
Trying different modeset values for radeon
Enabling both i915 and radeon in KMS
Playing with BIOS settings, however there was no option to completely disable the discrete graphics card
How can I turn that discrete graphics off? It runs quite hot and consumes lots of power.
Oh, and, this isn't a laptop computer. Currently the VGA cable is plugged into the motherboard, which has Intel HD graphics.

I think the solution in this post can help you...
https://bbs.archlinux.org/viewtopic.php?pid=951136
see post #4
Last edited by olsman037 (2011-06-20 12:26:59)

Similar Messages

Kernel debugging using git bisection method in combination with abs.

Is there any way to use git bisection method for kernel debugging in combination with ABS for building the kernel via makepkg?

Yes, but ABS for kernel uses some patches in order for the kernel to be successfully build.
ftp://ftp.archlinux.org/other/kernel26/
I wanted to know is if there is any way to distinguish what particular patch to use in every bisection point.

Problem with the file /proc/sys/kernel/hotplug which is incorrect

Hello,
Since few days, I can't import photos from my camera with my user (that work in root), I open a thread in this forum (http://bbs.archlinux.org/viewtopic.php?pid=348659).
After investigations, the problem come from the content of the file /proc/sys/kernel/hotplug which is just :
-e
When I run the start_udev script, the content of /proc/sys/kernel/hotplug change and importing photos with my user work again.
I isolate the only important line for my problem :
echo -e '\000\000\000\000' > /proc/sys/kernel/hotplug
When I run this line after a boot, the import file from camera work.
I think that the content of the file is bas setted while the udev starting or replaced by another event which occurs later !
I use the x86 version up-to-date with kdemod.
Someone have an idea of why the content of /proc/sys/kernel/hotplug (it must contain an executable for kernel call on hotplugging) is bad ?
Last edited by tuxom (2008-03-30 13:31:14)

I think I've found the problem, see my comment in http://bugs.archlinux.org/task/9935. Thanks for the information about /proc/sys/kernel/hotplug!

Kernel debugging is taking up my HD space!

-rw-r--r-- 1 root wheel 26894118401 26 Jun 00:36 /var/log/daily.out
-rw-r--r-- 1 root wheel 7082 1 Jun 10:32 /var/log/monthly.out
-rw-r--r-- 1 root wheel 6525 23 Jun 09:27 /var/log/weekly.out
All of that daily.out log is just kernel debugging, around 26GB worth of it. Any ideas on how to stop it without deleting the daily.out log?

This is what I don't understand. A get info on the drive show this:
However, when I do a get info of the contents of the drive, I find this:
This totals almost 66GB. Where are those other files? I don't run Boot Camp or VM.

System log: kernel Debug 2.0.38 m378d97c0 0

This message has been appearing in system.log
kernel Debug 2.0.38 m378d97c0 0
Any idea what this is refering to?

What is the frequency of that message in your syslog?
Nine times in the past 24 hours. But oddly enough, I'm now seeing debug in other messages as well as well:
kernel Debug System Sleep
kernel Debug System Wake
I recently installed TTP 4.6.1, which is the only thing I can think of that might be related, though why it would put the kernel into debug mode is beyond me. I'll have to do some more research. Thanks.

Where can I get Mountain Lion Kernel Debug Kit?

Where can I get Mountain Lion Kernel Debug Kit? The latest available kit is for 10.7.4

There are none available except for ones you've created yourself.
(75822)

How can I tell the VMware GdbServer stub to set a processor core during kernel debugging session?

I'm using the VMware DbgServer stub for kernel mode debugging a Windows X86 VM and I want to set a different thread (or processor) in order to get/set the processor context, but the DbgServer replies that the target only has one thread running.
(gdb) info threads
Sending packet:
$T1#85...Ack
Packet received: OK
Sending packet: $qfThreadInfo#bb...Ack
Packet received: m1
Sending packet: $qsThreadInfo#c8...Ack
Packet received: l
Thread 1 ( Name: VCPU 0 ) 0x81626a08 in ?? ()
Questions:
1. How can I tell the VMware DbgServer stub to set a processor core or even another thread during kernel debugging session?
2. How can I set/get context or stepping from a different thread or processor core?
Any help will be highly appreciated.
Thanks,
Alex.

Nick-
In my experience, the only tell is in the result with Lightroom unless your processor is dog slow. You can select PS as the active app. on my Mac and see it working.
You could also modify the action to not save and close, and then check History in PS.

Initscripts -- echo "$HOSTNAME" | /proc/sys/kernel/hostname

I just updated initscripts and rc.sysinit is no longer working as expected.
It seems when:
if [[ $HOSTNAME ]]; then
echo "$HOSTNAME" >| /proc/sys/kernel/hostname
fi
is run. /proc/sys/kernel is not yet existing.
So $HOSTNAME is now set to "(none)" and my prompt is:
root@(none)...
And this is in "Newbie", because I have just had a look at /proc/... so far and never before touched it... And I am asking, because I am not sure if it is just initscripts or related to systemd and .conf files.
Last edited by Marcus27 (2012-10-02 04:18:00)

This happens to me as well. It started when I rebooted yesterday after the initscripts update. I was planning to have a look at this tonight, so I'll come back and check this thread before doing anything :-)
I wasn't sure if it was linked to the initscript package, since I hadn't rebooted for several days.
The machine is a VPS (Xen), in case this changes anything.
Last edited by fredo1664 (2012-10-02 04:36:00)

Kernel[0]: ath_bmiss_proc: beacon miss -- Any clue?!

Hi, I'am new to mac os maintenance, and I would like to know what's does these lines mean in my system.log:
Thanks for the help
Jan 14 18:23:55 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:24:05 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:25:03 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:25:23 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:25:54 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:26:17 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:27:23 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:27:32 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:31:27 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:32:10 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:32:17 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:32:19 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:32:44 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:33:10 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:33:20 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:33:53 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:33:55 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:39:34 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:39:44 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:41:15 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:42:01 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:42:11 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:45:39 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:46:27 Admin-Computer kernel[0]: athbmissproc: beacon miss
Jan 14 18:48:12 Admin-Computer kernel[0]: athbmissproc: beacon miss

Hi MarcoFilipe
Welcome to Apple Discussions!!
can someone help?I did a Google search on "athbmissproc: beacon miss" and it would appear this is a problem with MacBook WiFi. It is also a problem reported in FreeBSD, where there are reported workarounds (in code) for phantom interrupts causing this problem. I don't know there is much you can do about it until Apple releases a fix.
Not having wireless on my machine means I can't investigate further, but I'll see if I can find someone who can.

How to kernel debug MacBook Air

I am writing a kernel driver for the MacBook Air and am getting a kernel panic. How do I do a two-computer debugging setup on the MBA without builtin Ethernet or Firewire? I have a third-party USB Ethernet Adapter, but it loses its IP as soon as the kernel panics.

What year is your Macbook Air and are you the legal owner of Mountain Lion? Meaning, did you purchase Mountain Lion via App Store? - If you did, then I can show you how to do a clean install.

ISG Debug - IP configuration missing for radius proxy session initiation

Folks,
We are trying to configure the ISG as a Radius-Proxy for EAP Authentication. I have configured aaa server radius proxy, clients and aaa auth radius-proxy group as per the guide. I have my interface config as follows:
interface TenGigabitEthernet0/2/0.205
encapsulation dot1Q 205
ip vrf forwarding CS
ip address 10.20.0.1 255.255.224.0
ip helper-address global 172.X.X.X
no ip redirects
no ip proxy-arp
ip tcp adjust-mss 1420
service-policy type control DEFAULT_RULES
ip subscriber l2-connected
initiator dhcp
initiator radius-proxy
arp ignore local
When I try to connect a wifi client to an AP, I can see that the AP is forwarding the Access-Request to the ISG but the ISG does not forward it to the AAA. In the ISG debug I see the following message:
RADIUS: IP configuration missing for radius proxy session initiation
Can any one help to identify what is missing here pls?
Thank You in advance!

Kiran,
Did you follow this guide? It looks like the interface configuration is there but you didnt include the actual radius configuration does it follow the guide here -
http://www.cisco.com/en/US/docs/ios/isg/configuration/guide/isg_radius_proxy.html#wp1055053
Thanks,
Tarik Admani

How do I install I-tunes for a pc windows 7 operating sys, orig I-tunes is missing something?

How do I fix i-tunes on my pc when I get a message that msvcr-80.dll is missing? When I try to reinstall I get a message that I need to document that I am authorized.

Troubleshooting issues with iTunes for Windows updates - MSVCR80

Sys Pref Desktop/Screensaver Icon missing

The Desktop/Screen Saver Icon is missing in my System Preferences Icon on the dock. In the screen saver folder everything is still there. I've tried the Tech Tool download without success. I tried entering the Time Machine and replacing the System Preferences Icon but that didn't bring back the missing icon. Any ideas?
Thanks

Perform a custom install from the Mac OS X 10.5 disk and install only that component if possible; if not, use Pacifist to install it. In either case, run the combo updater for your Mac OS X version afterward.
(45091)

[SOLVED]kernel module capability is missing!

Hello,
I was going to setup bind server,with the help of wiki.Wiki mentions that i need capability module to be loaded.
But when i
[root@server ~]# modprobe capability
FATAL: Module capability not found.
[root@server ~]#
Do i need this module for my dns server???If i do,where can i find it?:rolleyes:
My kernel is the following:
[root@server ~]# uname -a
Linux server 2.6.33-ARCH #1 SMP PREEMPT Mon Apr 26 19:31:00 CEST 2010 x86_64 AMD Athlon(tm) II X2 240 Processor AuthenticAMD GNU/Linux
Last edited by ganastasiou (2010-05-08 09:18:03)

looks like this "capability" is compiled in by default:
http://bbs.archlinux.org/viewtopic.php?pid=331319
I removed the respective part from the wiki page.

[Solved] Compiling kernel with 'localmodcfg' - 'brcmsmac' missing

Hi all,
I want to compile my own optimized ck-kernel with localmodcfg="y" which works mostly.
However there is a small problem.
The module 'brcmsmac' for the WLAN card is never included although it is listed in my modprobed.db.
Does someone have any clue what could be the cause?
Thanks
Radioactiveman
Last edited by Radioactiveman (2012-01-13 16:36:15)

A minor fix for the patch by Steven Rostedt solved my issue.
I have compiled linux-ck 3.2.1-2 with localmodconfig today and brcmsmac is now included.
Marking the thread as solved, thanks to Steve.
Patch file:
diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index ec7afce..bccf07d 100644
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -250,33 +250,61 @@ if ($kconfig) {
read_kconfig($kconfig);
+sub convert_vars {
+ my ($line, %vars) = @_;
+
+ my $process = "";
+
+ while ($line =~ s/^(.*?)(\$$(.*?)$)//) {
+ my $start = $1;
+ my $variable = $2;
+ my $var = $3;
+
+ if (defined($vars{$var})) {
+ $process .= $start . $vars{$var};
+ } else {
+ $process .= $start . $variable;
+ }
+ }
+
+ $process .= $line;
+
+ return $process;
+}
+
# Read all Makefiles to map the configs to the objects
foreach my $makefile (@makefiles) {
- my $cont = 0;
+ my $line = "";
+ my %make_vars;
open(MIN,$makefile) || die "Can't open $makefile";
while (<MIN>) {
+ # if this line ends with a backslash, continue
+ chomp;
+ if (/^(.*)\\$/) {
+ $line .= $1;
+ next;
+ }
+
+ $line .= $_;
+ $_ = $line;
+ $line = "";
+
my $objs;
- # is this a line after a line with a backslash?
- if ($cont && /(\S.*)$/) {
- $objs = $1;
- $cont = 0;
+ $_ = convert_vars($_, %make_vars);
# collect objects after obj-$(CONFIG_FOO_BAR)
if (/obj-\$$(CONFIG_[^$]*)\)\s*[+:]?=\s*(.*)/) {
$var = $1;
$objs = $2;
+
+ # check if variables are set
+ } elsif (/^\s*(\S+)\s*[:]?=\s*(.*\S)/) {
+ $make_vars{$1} = $2;
if (defined($objs)) {
- # test if the line ends with a backslash
- if ($objs =~ m,(.*)\\$,) {
- $objs = $1;
- $cont = 1;
foreach my $obj (split /\s+/,$objs) {
$obj =~ s/-/_/g;
if ($obj =~ /(.*)\.o$/) {
Last edited by Radioactiveman (2012-01-13 16:37:06)

Vgaswitcheroo, /sys/kernel/debug/vgaswitcheroo is missing

Similar Messages

Maybe you are looking for