I was wrestling for some time to get my Bluetooth Headset to work with my notebook (lenovo thinkpad t460) with debian testing. My problem was, that only the speaker (audio-out) was working, but the microphone of the headset was not identified by the system.
The solution was really easy (after finding out what to do): You have to change the audio profile of the headset to “Headset Head Unit (HSP/HFP)”. I did this with the pavucontrol command of pulseaudio.
If you heard about kotlin and have some knowledge about the spring framework you might enjoy this 30 min video presentation on infoq.com.
Mark Heckler discusses how Kotlin can be used to reduce boilerplate and increase code quality, showing how to begin incorporating Kotlin into an existing Spring application.
Springing into Kotlin: How to Make the Magic Even More Magical
If you are someone like me – meaning you use thunderbird/enigmail on debian testing – you might be interested when enigmail 2.x is coming into the testing repositories. You know, because of efail.
There is one reddit discussion about the status of enigmail 2.0 in debian stable/stretch. But what about us testing users? There is the debian package tracker website where you can get more details on which package is on the way into stable/testing/experimental. The page for enigmail shows that enigmail 2.0.6-1 is on its way, but I have no experience how long it will take to trickle into debian testing.
Maybe some of you out there have any experience? How long does it take?
Maybe you have experienced something like that too. You have a network attached storage and you connect it (for example via nfs) to your kodi system running on another machine (e.g. on a raspberry pi). You change something in your network configuration and – bam – nothing works. This could happen, because kodi gets it media data via a network address composed of IP addresses instead of a host name. If this happens to you – and it happened to me several times – this sucks. The first times I just created a new media source with the new IP address and imported all the media again. But wouldn’t i be nicer to just migrate the existing entries in kodi to their new location? This can be done relatively easy.
First: Use the /etc/hosts to define a hostname for the ip address of your NAS. Why? Because if there are new changes in your network configuration, you only need one change and everything is working again. Hint: If you are using librelec (like me), you need to set the hosts configuration in /storage/.config/hosts.conf .
Second: This doesn’t help you in the first place, if all your media entries are still linked to the old location. But there is a solution too: Kodi uses sqllite databases to manage its state. So you can use a sqllitebrowser like http://sqlitebrowser.org/ to change the wrong location of the media entries. Just follow the howto on the kodi wiki!
After this: Enjoy!
If you want to check if a given port is open on a given remote server, you can use telnet. More and more telnet disappears on server. So the question arises: What can we use instead of telnet? Short answer: netcat. For example:
nc -zv 192.168.1.15 22
Which checks if the port 22 (SSH) is open on the server 192.168.1.115
As a reminder for myself and maybe as a help for others: If you try to start the android emulator via Android Studio and the console tells you only this:
WARN – run.EmulatorConnectionListener – Timed out after 300seconds waiting for emulator to come online.
Then maybe you have fix your problem by removing the libstdc++.so.6 provided by the Android Studio so it uses the system one. For example:
~/Android/Sdk/emulator/lib64/libstdc++$ mv libstdc++.so.6 libstdc++.so.6.bak
Source: Stack Overflow: Cannot launch emulator on Linux (Ubuntu 15.10)
(work in progress)
A friend of mine got a new notebook the HP Elitebook 840 G4 with Windows 10. In this blogpost I want to document whats working and what not.
More detailed information about the hardware (lspci). You can also look at the the output of lspci -v
00:00.0 Host bridge: Intel Corporation Device 5904 (rev 02)
00:02.0 VGA compatible controller: Intel Corporation Device 5916 (rev 02)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller (rev 21)
00:15.1 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI (rev 21)
00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21)
00:1c.0 PCI bridge: Intel Corporation Device 9d11 (rev f1)
00:1c.3 PCI bridge: Intel Corporation Device 9d13 (rev f1)
00:1d.0 PCI bridge: Intel Corporation Device 9d18 (rev f1)
00:1f.0 ISA bridge: Intel Corporation Device 9d58 (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Device 9d71 (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4) I219-V (rev 21)
01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS522A PCI Express Card Reader (rev 01)
02:00.0 Network controller: Intel Corporation Device 24fd (rev 78)
03:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd Device a804
I installed Linux Mint 18.1. The only non standard thing i had to do, was to shrink the Windows 10 partition with gnuparted. The installer had no option for that or I did not found it. Other than that, the installation went without a hitch and I was able to start both Windows 10 and Linux mint afterwards.
The kernel which is installed is linux-image-4.4.0-72-generic.
As the display of the notebook has 2560×1440 pixel, the user interface was very small and difficult to use with both the mate and cinnamon flavor. Cinnamon has a configuration (Settings-General) where you can scale the interface for high dpi displays as that one. With the option “double” the cinnamon user interface is quite nice and usable.
As of now, the wifi is not working. There seems to be drivers missing. Output of lshw
*-network UNCLAIMED
description: Network controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
version: 78
width: 64 bits
clock: 33MHz
capabilities: cap_list
configuration: latency=0
resources: memory:d8a00000-d8a01fff
While lspci gives me
Network controller: Intel Corporation Device 24fd (rev 78)
If you are interested in open source and privacy friendly android apps you should have a look at this two projects.
The group Privacy Friendly Apps are a collection of Android-Applications, which are optimized based on privacy. This means that only a minimum of permissions is used. There are no unnecessary permissions, e.g. a torch application would ask for a permission to read the contacts.
They provide apps like dicer, sudoko, weather and more. You can find a list of all their apps in the google playstore.
Simple Mobile Tools: A group of simple, stupid, open source Android apps with customizable widgets, without annoying ads and unnecessary permissions.
They develop camera, file-manager, gallery apps and more. You can find the apps on github/f-droid and play store.
If you are using maven you may have been flabbergasted by an error like this
[ERROR] Non-resolvable parent POM: Failure to find at.test:test:pom:23 in https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced and 'parent.relativePath' points at wrong local POM @ line 9, column 10
I had this error and was wondering why it was occurring? I had the parent artifact in my local repository. It was not missing. Maven did know this, because the log said
[DEBUG] Verifying availability of /home/stefon/.repository/at/test/test/23/test-23.pom from [central (http://repo.maven.apache.org/maven2, releases)]
So if I have the parent POM file in my repository and maven knows about it? Why are we getting an error?
As the file is not available on central, Maven will (correctly in my opinion) fail the build as the build would be non-reproducible.
(Mailarchive Maven-Users)
So, what do we do if it is not possible to publish our parent pom artifact?
there is a CLI option that you can enabled in Maven 3.1.1 that tells Maven “I know what I am doing and don’t make that check this time” i.e. –legacy-local-repository
In other words:
mvn clean install --legacy-local-repository
Just remember: This is a hack and may break at any moment with a new maven version! There is an blog article where you can find other solutions for your problem
Java 8 is released since 2014. If you are working in an enterprise oriented company, chances are you are only now getting experience with usage of Java 8. You may ask yourself what this warning is telling you.
VM warning: ignoring option MaxPermSize=128M; support was removed in 8.0
Why is PermGen gone? An article of infoq.com tells you something of the reasoning behind this change.
Stefon's Blog 