Linux Becomes Slow After Resume / Suspend

Recently, I built a new computer with ASRock J3455-ITX which has a Apollo Lake processor build-in to run IDE and VisualStudio Code. I have to use OpenSuSE Tumbleweed to replace my favorite Leap because it requires the latest kernel to support Apollo Lake.

Everything seems fine but it becomes very slow after resume / suspend. I have tested many power-related settings in UEFI (Unified Extensible Firmware Interface) and none of them help. If I logout GNOME and login again, I regain my normal speed.

I try to google “linux slow after resume” and found some useful information. It seems related to

Doug Smythies and jat255 provide detail explain and a solution to restore CPU frequency as a service in Slowdown after resume from suspend on ArchLinux.

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Files Contain Windows Invalid Characters Transferred from QNAP to Asustor Using rsync

I want to copy files from QNAP TS-119P II to Asustor AS-5102T directly. There are many solutions: including ftp, rsync, or mount a shared folder.In my case, rsync is the easiest solution.

TS-119P II runs QTS 4.3.3 while AS-5102T is ADM 2.7.1. Details steps might be different if you are using different firmware versions.

I will also talk about invalid characters in names and how ADM handle it. A must read for non-Windows users.

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How to Remove Unwanted SSH Keys

After re-install my Synology DSM, I cannot use ssh to login DSM. It prompts for following warning message:

Last login: Thu Jun 16 10:11:39 on console
Amigos-Mac-mini:~ Amigo$ ssh admin@
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
Please contact your system administrator.
Add correct host key in /Users/Amigo/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/Amigo/.ssh/known_hosts:1
ECDSA host key for has changed and you have requested strict checking.
Host key verification failed.
Amigos-Mac-mini:~ Amigo$ 

In short, I have to remove my previous key. It’s saved in different location with different tools.

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Regular Font with Bold in ODT Files on Mac and OpenSuSE with LibreOffice

I have already create many files with LibreOffice on OpenSuSE. When I open them on OS X with LibreOffice for Mac OS X, anything being formatted with bold and shadow are displayed improperly. I can hardly read them.

2015/3/23: It has been fixed in Everything is displayed properly now.

Regular Font with Bold Displayed on LibreOffice for Linux, Mac, and PDF generated by LibreOffice for Mac.
Regular Font with Bold Displayed on LibreOffice for Linux, Mac, and PDF generated by LibreOffice for Mac.

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