Fixing color issue in Fedora 26, Chrome and external monitor

If you use Chrome version 62 under Fedora 26 and realize the blue color becomes purple on your external monitor (laptop screen is fine) then welcome to the club! My first guessing was cable – changed it with the same result, then tried different monitors with different connection methods – VGA, HDMI, USB. No luck. Then I spent some time to check my video card, google similar problem. But suddenly I put Firefox to the same external monitor and found blue color as a blue!

So, card is fine, monitor and cable are fine too. The problem with some weird settings of Chrome. Using this Reddit thread I found solution:

  • Open new tab and type there chrome://flags
  • Find option “Force color profile” and set it to “sRGB”
  • Restart Chrome and enjoy blue as blue šŸ™‚

Configure Juniper VPN connection on Fedora 15

Recently I spent a few hours to configure VPN connection using Juniper on my Fedora 15 laptop. Actually there is nothing difficult. But I’d like to mention to one nuance. Looks like Juniper doesn’t work with openJDK Firefox plugin. It needs Sun/Oracle only! Otherwise VPN connection will be terminated immediately after start without any errors or warnings. So, here a few simple steps to configure Juniper VPN connection on your Fedora 15:

  • download and install the latest Java (choose your architecture – 32bit or 64bit);
  • install xterm – sudo yum install xterm
  • replace symlink on Java Firefox plugin – sudo ln -sf /usr/java/jdk1.6.0_25/jre/lib/i386/libnpjp2.so /usr/lib/mozilla/plugins/libjavaplugin.so
  • restart the Firefox and launch your VPN connection. It run Juniper and ask you to accept certificates as well as root password in the xterm.

That’s it. You may use VPN connection now. Additionally you can setup a script to run VPN connection as it’s described in that post.

See also

KDE 4.1 useful tips and tricks

Preface

When I tried KDE 4.0 first time a few monthes ago I was very disappointed. The system was absolutely unusable. Mainly it was the reason why I didn’t upgrade my Fedora to version 9. But after 10 was released I decided to make an upgrade. I thought that KDE 4.1 should be better. It’s really better but to setup my accustomed environment I spent two days including GNOME configuration because I couldn’t work in KDE. So, I decided to write that post to share my experience and use it my myself what I’ll setup another PC.

Continue reading KDE 4.1 useful tips and tricks

Meet Werewolf

Today I upgraded my work PC up to Fedora 8 (Werewolf). Unlike previous upgrades I tried to use yum. I run the procedure according to Upgrading Fedora Using Yum. It took about 3 – 4 hours and finished successfully. After rebooting I just install a plug-in to listen MP3
yum update alsa-plugins-pulseaudio
and patched VMWave to build vmnet on post 2.6.23 kernels. That’s it! Enjoying fast system šŸ™‚

P. S. Another workaround. Any Java-based applications crashes with following error:
java: xcb_xlib.c:50: xcb_xlib_unlock: Assertion `c->xlib.lock' failed.
Hack which works for me is following:
sed -i 's/XINERAMA/FAKEEXTN/g' /usr/java/jre1.6.0_01/lib/i386/xawt/libmawt.so

Fedora Core 6 Tips and Tricks

I’d like to introduce for all who use Linux Fedora this excellent set of Fedora Core 6 Tips and Tricks. I found very useful for me tips about installation of mplayer, Macromedia Flash, IEs4Linux and MS TrueType Fonts. I spent only a few minutes to setup good looking, functional work space.
There is a similar manual for Fedora Core 5.

Fedora Core 6 and Acrobat Reader

After I loose my previous work environment I decided to install Fedora Core 6 released last month. It looks nice and works faster. But I found a big troubles with using Adobe Acrobat Reader. I downloaded RPM from Adobe site and installed it. But when I tried to open it I saw just continiusly repeated messages:
expr: syntax error
After five minutes of googling I found the solution:

1. Open file /usr/bin/acroread as root

2. Find the row 418
echo $mfile| sed 's/libgtk-x11-\([0-9]*\).0.so.0.\([0-9]\)00.\([0-9]*\)\|\(.*\)/\1\2\3/g'

3. Replace it by
echo $mfile| sed 's/libgtk-x11-\([0-9]*\).0.so.0.\([0-9]*\)00.\([0-9]*\)\|\(.*\)/\1\2\3/g'

4. Find the row 644
MIN_GTK_VERSION="240"

5. Replace it by
MIN_GTK_VERSION="2040"

After this simple patching Acrobat Reader works fine.

Fedora Core 6 and Mactel

Fedora Core 6 will support Intel-based Macs. It’s good news espessially I need to boot Linux on Mac Mini to have possibility use it as Plutohome media director. But it should be Debian and Mini should boot from via network.
Anyway, you can find a short explanation how to make Dual Booting with OS/X and Fedora Core 6. Also, Jeremy Katz reports some problems with Apple hardware like wireless with Atheros chipset. So, let’s wait release of 6th Fedora to use it on Macs.

Flash Plugin and X.Org 7.0

After upgrate my work PC to Fedora Core 5 I found that Google Analytics didn’t display any text. I left it as it was (yes, yes, I know that it’s not characterize me good side). Today I lost my patience when tried to see SmartBlog statistic. The good article – “The flash plugin and X.Org 7.0 (X11R7) font problems” helped me resolve my problem. I made a symlink to X11 fonts configuration:
ln -s /etc/X11/fs/ /usr/X11R6/lib/X11/fs
and restart Firefox. After that flash player found fonts and displayed text correctly.