Linux, laptop and external HDMI display problem.

Not very nice workaround for a problem on Kubuntu 18.04 laptop when system doesn’t notice that external HDMI display has been disconnected if the speed which user plugs out HDMI cable is less than five speeds of light.

SSD wear and frequent small writes into MySQL DB

For about 2 years I used SSD as a system drive for my home server. It was mounted with noatime attribute and I knew there would be no services which can cause heavy write load on it. But recently I started a project which requires a small amount of data to be written in database each second or two. I guessed that such kind of load would increase ssd’s wear but I was unprepared to face how huge the wear is…

Recording h264 RTSP stream from surveillance camera using ffmpeg

For several years I used Vstarcam software (IP Camera Super Client) on Windows to record video stream from my cameras. This software (I preferred specific version 1.1.4.557) is quite reliable, though it produces video files that can’t be played by other video players. You can watch them only using this application. It was also painful […]

Why my last attempt to move to Linux has failed

As I mentioned in the post about Cinnamon power management, I decided to give Linux a try one more time. It happened after I had tried to install Windows 10 and those installation continued the whole night. Moreover, there was no any progressbar or something during the installation of OS and especially during the installation […]

Acer C720, its swollen battery and RTC.

A few days ago I pulled my Acer C720 out of the nightstand and noticed that it has a strange shape…
It’s keyboard was bulged toward the screen so the laptop can’t be closed completely.
Battery was swollen.
After I have removed the battery everything seems to work well except the wifi. Wifi couldn’t connect to anywhere and somehow I understood that the problem is incorrect date in RTC. RTC really had some fake date in the far future. It seems that there is no separate CMOS battery in this laptop. And I was needed to find the way to fix it.