About one year ago I wrote about the OpenGL/GLSL debugger glsldevil in the article gentoo ebuild for glsldevil-1.1.5 and provided a gentoo ebuild for it. Unfortunately glsldevil seems not to be available anymore from the web page of the University of Stuttgart (http://cumbia.informatik.uni-stuttgart.de/glsldevil/), which has rendered the ebuild useless.
Edit 29/5/2012: The original download site of the University of Stuttgart is available again.
Since the license of glsldevil permits redistribution, I decided to upload my local copy, to make glsldevil available for the public again. Unfortunately this only includes the Linux binaries (32bit and 64bit) and neither Windows binaries or the source code.
After the latest upgrades on my gentoo vserver system running a 3.3.0 Linux vserver-kernel (vserver-sources-2.3.3.1), the system did not start up properly anymore. No kernel modules got loaded and even the network devices have not been available after a reboot. This is more or less the worst case, since then one has to be physically in front of the machine and can not repair the system via ssh remote login.
The kernel upgrade was not the reason for this, but the upgrade to udev-182. This is what the log said:
Mar 21 17:20:05 mittelerde /etc/init.d/sshd[5563]: ERROR: cannot start sshd as net.eth0 would not start Mar 21 17:20:09 mittelerde /etc/init.d/udev-mount[6075]: Udev uses a devtmpfs mounted on /dev to manage devices. Mar 21 17:20:09 mittelerde /etc/init.d/udev-mount[6076]: This means that CONFIG_DEVTMPFS=y is required Mar 21 17:20:09 mittelerde /etc/init.d/udev-mount[6077]: in the kernel configuration. Mar 21 17:20:09 mittelerde /etc/init.d/udev-mount[6067]: ERROR: udev-mount failed to start Mar 21 17:20:09 mittelerde /etc/init.d/udev[6066]: ERROR: cannot start udev as udev-mount would not start Mar 21 17:21:06 mittelerde /etc/init.d/net.eth0[6463]: ERROR: interface eth0 does not exist
With the information “CONFIG_DEVTMPFS=y is required” the log contains the necessary hint to get things to work. The CONFIG_DEVTMPFS option had to be enabled in the kernel. Afterwards the kernel has to be recompiled. The option can be found in menuconfig under Device Drivers-> Generic Driver options and is called Maintain a devtmpfs filesystem to mount at /dev. For getting the devfs automatically mounted at boot time it makes sense to also enable the option Automount devtmpfs at /dev, after the kernel mounted the rootfs (CONFIG_DEVTMPFS_MOUNT).
It is safe to enable these options with older udev versions. Doing so protects your system from not working any more when you get the udev update later.
Starting with the 2.6.36 kernel, tuxonice has been removed from zen-sources. The latest official tuxonice patch, that is available at present, is for the linux kernel 3.0. In the meanwhile more recent patches, for kernel version 3.2.1 and 3.2.10, have appeared at crow202.org. So I patched the zen-stable-3.2 sources with the 3.2.1 tuxonice patch from there.
Suspend to RAM works with this kernel, at least on my Dell Precison M65 and my Desktop, as well as suspend to disk does. Furthermore I can confirm, that the 3.2.1 patch also works on the x86_64 architecture.
To get things to work, download the zen-stable-3.2 kernel tree from zen-kernel.org and extract it. Afterwards download the 3.2.1 tuxonice patch from crow202.org and apply it. After applying the patch you can continue with the standard kernel building process. As with zen-sources-3.1, no additional patch is necessary for the zcache feature, the fix is already included in zen-stable-3.2. The zcache feature doubles RAM efficiency while providing a significant performance boosts on many workloads. The zcache feature is located under staging drivers in the kernel tree and depends on the cleancache feature, which is located under processor types and features. To enable the zcache feature, you have to pass the zcache keyword to your kernel, in example in your grub.conf.
and extract it in /usr/local/portage. The overlay contains all necessary patches. Be sure to include the following line in your /etc/make.conf:
PORTDIR_OVERLAY=”/usr/local/portage”
If you want to use tuxonice include tuxonice in your USE-flags. Then emerge zen-sources and build the kernel as you like.
Tuxonice is not officially supported in current zen-sources. So If you’re using the files above, don’t report any bugs to zen-sources.org. You are on your own.
For my Precision M65 I used the following kernel config:
Starting with the 2.6.36 kernel, tuxonice has been removed from zen-sources. The latest official tuxonice patch that is available is for the linux kernel 3.0. However, I found a more recent patch at gmane.org. So I patched the zen-stable-3.1 sources with this tuxonice patch.
Suspend to RAM works with this kernel, at least on my Dell Precison M65 and my Desktop, as well as suspend to disk does.
To get things to work, download the zen-stable-3.1 kernel tree from zen-kernel.org and extract it. Afterwards download the tuxonice patch from gmane.org and apply it. After applying the patch you can continue with the standard kernel building process. This time no additional patch is necessary for the zcache feature, the fix is already included in zen-stable-3.1. The zcache feature doubles RAM efficiency while providing a significant performance boosts on many workloads. The zcache feature is located under staging drivers in the kernel tree and depends on the cleancache feature, which is located under processor types and features. To enable the zcache feature, you have to pass the zcache keyword to your kernel, in example in your grub.conf.
and extract it in /usr/local/portage. The overlay contains all necessary patches. Be sure to include the following line in your /etc/make.conf:
PORTDIR_OVERLAY=”/usr/local/portage”
If you want to use tuxonice include tuxonice in your USE-flags. Then emerge zen-sources and build the kernel as you wish.
Tuxonice is not officially supported in current zen-sources. So If you’re using the files above, don’t report any bugs to zen-sources.org. You are on your own.
For my Precision M65 I used the following kernel config:
Starting with the 2.6.36 kernel, tuxonice has been removed from zen-sources. The latest tuxonice patch that is available is for the linux kernel 3.0. So I patched the zen-stable-3.0 sources with tuxonice. Hopefully a patch for more recent kernel versions will be available soon.
Suspend to RAM works with this kernel, at least on my Dell Precison M65 and my Desktop, as well as suspend to disk does.
To get things to work, download the zen-stable-3.0 kernel tree from zen-kernel.org and extract it. Afterwards download the tuxonice patch from tuxonice.net and apply it. For getting the zcache feature, to work you have to download and apply this patch:
The zcache feature doubles RAM efficiency while providing a significant performance boosts on many workloads. The patch has been extracted from vserver-sources-2.3.2.5 with working zcache feature. After applying the patch you can continue with the standard kernel building process. The zcache feature is located under staging drivers in the kernel tree and depends on the cleancache feature, which is located under processor types and features. To enable the zcache feature, you have to pass the zcache keyword to your kernel, in example in your grub.conf.
and extract it in /usr/local/portage. Be sure to include the following line in your /etc/make.conf:
PORTDIR_OVERLAY=”/usr/local/portage”
If you want to use tuxonice include tuxonice in your USE-flags. Then emerge zen-sources and build the kernel as you wish.
Tuxonice is not officially supported in current zen-sources. So If you’re using the files above, don’t report any bugs to zen-sources.org. You are on your own.
For my Precision M65 I used the following kernel config:
In the post Flightgear with quad buffered stereo I have written about how to get quad buffered stereo to work with the famous flight simulator FlightGear. Recently FlightGear-2.4.0 has been released. The problem with quad buffered stereo still persists with FlightGear-2.4.0 .
One expects to enable stereoscopic mode in FlightGear starting it with the following line:
When starting flightgear this way, one gets the following console output and no stereoscopic view:
Warning: detected OpenGL error ‘invalid operation’ after RenderBin::draw(,)
Getting FlightGear to work with quad-buffered stereo
The reason for the above error message and the resulting broken stereo mode is, that the stereo context does not get initialized properly. The details are described here: Flightgear with quad buffered stereo. However, the good news is, that the patch I proposed in the mentioned post, still works with FlightGear-2.4.0. You can download the patch from here:
As usual for quad buffered stereo, you have to use a professional graphics board that supports quad buffered stereo, like a NVIDIA Quadro FX or a Ati FireGL and proper display hardware, like shutter glasses, a HMD or a stereoscopic projection system, to benefit from it. To use the quad buffered stereo mode start flightgear with the environment variables mentioned above. Afterwards you probably have to enable quad buffered stereo mode by selecting the Stereoscopic View Options Item in the the View menu.
With the previous version, when using the quad buffered stereo mode in flightgear, there occurred some graphics errors. Some cockpit controls and other scene details contained yellow lines, like a wireframe, which were not there when starting FlightGear in “normal” display mode. These problems seem to be gone with Flightgear-2.4.0. At least I did not notice them anymore.
The Gentoo way
For gentoo users I have created an overlay. Like the previous one it contains patches and modified ebuilds for flightgear with working quad buffer support. You may get the overlay from here:
There are no ebuilds for Teamspeak Server 3.0.0 and Teamspeak client 3.0.1 available in the net. Thus I modified the old one to match my needs. It has not been a difficult task, but surely someone will be happy to have the ebuild. If the automatic download fails, please download the distfiles from Teamspeak Servers.
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