Alien Pastures

My thoughts on Slackware, life and everything

Tag: vlc (Page 7 of 9)

Huge update to slackware-current and what it meant to my laptop

November 15, 2010 / / 36 Comments

Today, you may be watching the slackware-current ChangeLog.txt slack-faced, with a feeling of horror…

… because the update is HUGE. There are well over 300 lines of updates! That amounts to one-third of the full length of ChangeLog for the current development cycle. Those of you who thought Slackware was calmly drifting toward another stable release, will have to brace themselves for a round of fun and thorough testing.

I think the most obvious intrusive change is that Slackware-current moved to using the “new” X.Org which no longer depends on HAL for hardware detection and initialization. Instead, the new X.Org talks directly to udev.

Robby Workman has put a lot of work in assembling a coherent set of X.Org sources as well as getting this stuff tested widely before it got added to Slackware (see http://www.linuxquestions.org/questions/slackware-14/call-for-testing-xorg-updates-20100830-a-829336/).

There is also a newer GTK+2 (version 2.22). The new GTK proves to be a difficult bugger with apparent incompatibilities with previous releases. We have to see what the extent of these incompatibilities is; for instance I came across software does not compile anymore and needs patching or updating (gtk-chtheme).

When upgrading your slackware-current please note that several packages have been added, and others have been removed! If you are using slackpkg to do the upgrades for you, you can use the command “slackpkg clean-system” to remove the deprecated (mostly X.Org related) packages. In the package overview that presents itself, make sure to first deselect those you installed yourself before hitting the “OK” button! Likewise, running “slackpkg install-new” will install the newly added packages for you.

What were the bumps when I upgraded my Lenovo T400 laptop?

Well, several… but they were easy to fix.

X.Org configuration of the hardware:

Since the new X.Org no longer uses HAL, my old method of configuring the TrackPoint in a file “/etc/hal/fdi/policy/11-x11-trackpoint.fdi” no longer works. Instead, the new X.Org uses a configuration directory “/etc/X11/xorg.conf.d/” where you can add configuration files for your hardware. You’ll see the similarities; my old HAL file looks like this:

<match key="info.product" string_outof="TPPS/2 IBM TrackPoint;PS/2 Generic Mouse">
 <merge key="input.x11_options.EmulateWheel" type="string">true</merge>
 <merge key="input.x11_options.EmulateWheelButton" type="string">2</merge>
 <merge key="input.x11_options.YAxisMapping" type="string">4 5</merge>
 <merge key="input.x11_options.XAxisMapping" type="string">6 7</merge>
 <merge key="input.x11_options.Emulate3Buttons" type="string">true</merge>
 <merge key="input.x11_options.EmulateWheelTimeout" type="string">200</merge>
</match>

While the new way of configuring requires a file (I aptly named it “/etc/X11/xorg.conf.d/20-thinkpad.conf” but any name that ends on “conf” will do) in which I wrote:

Section "InputClass"
Identifier    "Trackpoint Wheel Emulation"
MatchProduct    "TPPS/2 IBM TrackPoint|DualPoint Stick|Synaptics Inc. Composite TouchPad / TrackPoint|ThinkPad USB Keyboard with TrackPoint|USB Trackpoint pointing device|Composite TouchPad / TrackPoint"
MatchDevicePath    "/dev/input/event*"
Option        "EmulateWheel"        "true"
Option        "EmulateWheelButton"    "2"
Option        "EmulateWheelTimeout"    "200"
Option        "XAxisMapping"        "6 7"
Option        "YAxisMapping"        "4 5"
Option        "Emulate3Buttons"    "true"
EndSection

You will have perform a similar exercise if you previously had configured a non-US keyboard in a HAL “fdi” file. I will leave it up to you to figure out how to repeat this for the new X.Org.

Hardware accelerated graphics:

Actually, this is where the updated packages shine! The combination of mesa, Intel graphics and KDE 4.5 proved to be quite disastrous a month ago when the kernel was updated in slackware-current. My KDE 4.5 packages froze the computer solid, the very moment when “desktop effects” (compositing) was enabled. This graphics hard lock is not caused by X.Org. Rather, it is the kernel’s DRI (direct rendering interface) and the way mesa interacts with it where all the trouble started. However,the real cause was not apparent at first (and some people were pointing at the open source graphics drivers). I had reported about this problem before – my Asus Eeepc 1000H which has an Intel graphics chip started having these compositing problems after the upgrade of the slackware-current kernel to 2.6.35.7 (i.e. before the upgrade of X.Org or mesa). As long as you were not using compositing in KDE 4.5, you would not see this problem at all.
The issue has been addressed in mesa (the library used by X.Org to enable software and hardware accelerated graphics). Slackware’s mesa was updated to 7.9 today and KDE’s compositing desktop is working now! My T400 with Intel graphics is happy again, as will be my EeePC after I upgrade that!

VLC and fullscreen video:

I had not expected this one, and I have not been able to find out what caused it. When resizing the VLC window, the dimensions of the embedded video would not grow beyond the actual pixel size of the video stream (i.e. there was no video scaling). I tried downgrading to an earlier version of VLC, I tried running XFCE instead of KDE, but the problem remained painfully visible as a big black border surrounding a tiny video. In the end, I ruthlessly removed the VLC configuration directories “~/.local/share/vlc/” and “~/.config/vlc/”. That helped! But it left behind a feeling of dissatisfaction.

xz (liblzma.so.0):

The xz package (used as the compression tool for the .txz package format) was updated too. The new dynamic library has another version number. I first noticed that I must have forgotten something when KDE refused to start after I finished upgrading. Several applications were spitting out errors about a missing “liblzma.so.0” library. This old library file was added to the “aaa_elflibs” package for compatibility reasons (along with a version of libtalloc.so), but this package is blacklisted in the “slackpkg” program so  “aaa_elflibs” was not getting upgraded. Usually (upgrading between two stable releases) this is the correct approach, because aaa_elflibs should contain redundant libraries. However, right after an update to this package you should run “upgradepkg” on it. I did that, and KDE started up normally again.

And thus starts a period of new play-testing, folks. Have fun, and give us good feedback!

Eric

Section “InputClass”
Identifier      “Trackpoint Wheel Emulation”
MatchProduct    “TPPS/2 IBM TrackPoint|DualPoint Stick|Synaptics Inc. Composite TouchPad / TrackPoint|ThinkPad USB Keyboard with TrackPoint|USB Trackpoint pointing device|Composite TouchPad / TrackPoint”
MatchDevicePath “/dev/input/event*”
Option          “EmulateWheel”          “true”
Option          “EmulateWheelButton”    “2”
Option          “EmulateWheelTimeout”   “200”
Option          “XAxisMapping”          “6 7”
Option          “YAxisMapping”          “4 5”
Option          “Emulate3Buttons”       “true”
EndSection

Running VLC in XFCE

August 27, 2010 / / 18 Comments

As you may know I am using KDE for my daily work. However, I use XFCE from time to time – for example when I have to run a remote X session over XDMCP and want to keep a fluid feel to the desktop.

When I was working in XFCE yesterday I wanted to use VLC to check a video file on my computer, and I was in for a surprise when clicking “Media > Open file” made my VLC hang indefinitely!

I remembered a discussion about this phenomenon on LinuxQuestions.org and indeed the solution as pointed out in that thread works for me.

What happens here?

The core of the issue, is that Qt4 makes an incorrect assumption about which GTK+ theme engine to use. A GTK+ theme engine makes a Qt4 application blend in nicely with a GTK+ based desktop environment such as XFCE, by using GTK+ instead of Qt4 to render all graphical components.

There are a few GTK+ theme engines available – one of them is QGtkStyle which is part of Qt4 in Slackware. However, Qt4 libraries look at the environment variable “GTK2_RC_FILES” in order to find out how to configure the GTK theme engine.

If this environment variable is not (or incorrectly) set, then Qt4 assumes that GTK+ is using GTK-QT-Engine which is not part of Slackware (GTK-QT-Engine is used to give GTK appplications a Qt feel when they are running in KDE) and it will not correctly apply the QGtkStyle engine. It sets QGtkStyle to use the GTK style Clearlooks, and outputs an error message which you will sometimes be able to see if you started a Qt-based application from a terminal:

QGtkStyle cannot be used together with the GTK_Qt engine.

This can be solved by explicitly telling Qt4 where Slackware keeps its GTK+ configuration files, and then making sure a GTK+ theme is configured there.

  • Define the environment variable “GTK2_RC_FILES” in one of these files: ${HOME}/.xinitrc (applies to just you) or in /etc/profile.d/qt4.sh (applies system-wide) by adding the follwing two lines to that file (assuming you are using bash as your default shell): 
    GTK2_RC_FILES="$HOME/.gtkrc-2.0:/etc/gtk-2.0/gtkrc"
    export GTK2_RC_FILES
  • Create a new file (or edit the existing) ${HOME}/.gtkrc-2.0 (so that the GTK theme applies to just you) or /etc/gtk-2.0/gtkrc (so that it applies system-wide) and add the following line to it: 
    gtk-theme-name="GTK+"

That should fix VLC’s “Media > File Open” dialog which will now appear instantly.

Note: You can choose a GTK+ theme for all your QT4 based applications if you want by running “qtconfig” and in the tab “Appearance” set the “Select GUI Style” to “GTK+” instead of “Desktop Settings (default)“.

Eric

GTK2_RC_FILES

Wondering how to spend my computer cycles

July 30, 2010 / / 15 Comments

I am beginning to feel the lack of computing power in my attic…

There is a pending KDE 4.5.0 release, which needs to be built for slackware-current. Then there is also VLC 1.1.2 which was released a few days ago… and those packages need to be built for Slackware 13.1 (so that they can join my main repository). I have only one “build box” which is fairly old and sporting a CPU without hardware virtualization capabilities.

Decisions, decisions… there’s only 24 hours in a day.

So I decided to start with building a test set of KDE 4.5.0 (the sources of which I already have) because that will be a big event for a lot of people, and leave the new VLC for another time. Don’t worry! Linux users will find that the 1.1.2 release of VLC does not offer anything worthwhile, except perhaps for some bugfixes in the DVB (digital video) module. The VLC 1.1.1 packages which I have created for Slackware are still very much OK.

Having to build packages for Slackware 13.1 as well as -current, and for two architectures (32-bit and 64-bit) is proving a bit too much for that old computer (which happens to be my home desktop as well), so I decided to use the donation money that has been accumulating and order an Athlon II X4 640 boxed CPU, along with an Asus M4N68T motherboard and 8 GB of RAM, completed with a 2 TB SATA hard drive. Once all that arrives on my doorstep, I will assemble a full computer using the case I have here (with a motherboard that caught fire last month because of a crappy condensator). That machine will become my new server.

Thanks to all of you who took the trouble to click my PayPal button – you know who you are, even if I did not thank you in person. Your gracious gifts will be spent with the purpose of making Slackware an even better experience.

By the way – I intend to use qemu-kvm to run a load of virtual machines on that computer, so that it will be easier to build in parallel. I have been considering VMware, VirtualBox and Xen as well. I decided against VMware for being closed-source. VirtualBox could still find its way onto the computer at some later stage; I decided against it because of the mixed license model where you get additional functionality only in the closed-source version. And Xen, well I am quite interested in how that works and performs, but unfortunately it requires a patched “xenified” kernel for the host and Linux guest. That was one bridge too far for me.

Nevertheless, there was a recent post from Chris Abela on the slackbuilds.org mailing list about the “The Xenification of Slack” which will most certainly help Slackware users get jumpstarted into the Xen world. Worth checking out, there is a tarball attached to that post with scripts and configuration files. Well done.

Enough of this, time for a beer.

Cheers, Eric

Miscellaneous packages (vlc,wine,wiipresent)

July 21, 2010 / / 12 Comments

Hi!

Just a quick message before I hit the bed,

I uploaded some Slackware packages for your consumption.

  • vlc – the new stable release 1.1.1 became available for download today and my packages are now ready to be grabbed at http://slackware.org.uk/people/alien/restricted_slackbuilds/vlc/ (this UK mirror hosts the packages with export restrictions – they contain mp3 and aac audio encoders) or http://slackware.com/~alien/slackbuilds/vlc/ . Several bugs got fixed and features added. See the VLC ChangeLog for details.
  • wiipresent – this package needed a rebuild (actually the supporting libwiimote needed a rebuild) because of the updated BlueZ stack in Slackware 13.1.
    I use the wiipresent software for presentations (duh)… It allows me to use my son’s Wii controller (the wiimote) as a pointing/navigation device so that I can walk the stage comfortably.
  • wine – this was recently released in a stable 1.2 version, after lots and lots of release candidates. Please note that my wine packages will only run 32-bit Windows binaries. Even the package I created for Slackware64 ! If someone convinces me that it is worth the effort to add support for 64-bit Windows to my wine package, I will add that, but not before. Also note that wine on Slackware64 requires multilib. You could build wine on a pure 64-bit Slackware but then it would only run 64-bit Windows binaries. That is not what I chose to offer you.

I hope you enjoy these updates!

Eric

VLC 1.1.0 has been released

June 22, 2010 / / 11 Comments

VideoLAN team has released version 1.1.0 of their VLC player.

This  release has many improvements over the previous 1.0.0 version of this “swiss army knife of media players“.

A detailed description of the changes can be found in the team’s announcement of the new release. You can also have a look at the supported features of the player.

Slackware packages are available for you: http://www.videolan.org/vlc/download-slackware.html . I’ll be happy with feedback from you, if you are using my package. Please note that you do not have to install any other package if you use mine. There are no package dependencies (except for libdvdcss which you have to install additionally if you want to watch “encrypted” DVDs – which means almost all DVDs).

Please note that the VideoLAN developers have decided to deprecate all older versions of their player. This means that as soon as a vulnerability is discovered in releases before 1.1.0, this vulnerability will not be patched and you will be urged to upgrade to 1.1.0 (or later) instead.

This decision was made because the developer team is currently stretched thin and is unable to maintain more than one stable and one development branch.

Have fun with this great piece of software!

Eric

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