Ubuntu goes to black screen on live USB boot

I have a custom built desktop with a Ryzen 1800x CPU and Radeon RX 580 GPU. Ubuntu has been working perfectly fine on this desktop until recently. I went to live boot 19.04 (after I had issues with my current install) but I am met with a black screen on boot. I went back and tried again with safe graphics enabled and it worked perfectly. However, after I installed it, I now have the same issue I had when I initially tried the live USB. I checked the integrity of the .iso and I have tried multiple different distros (Ubuntu, Manjaro, Clear, and Fedora). I am familiar with issues like this happening with Nvidia cards, but I have never had an issue with my AMD card on Linux. Any ideas? Thanks in advance!

Steam Game, 19.04, AMD, HDMI Screen goes beserk – fixed myself

The problem was F1 2017, downloaded and played through the steam client on a Ryzen 2500U Vega Mobile 8 Envy . Played on the laptop’s main display ok, but as resolution was set as less than the HDMI TV disclay I got those pixels in the corner and gobbledegook all over the rest of the screen flickering.

that said, there are plenty of problems trying to play it. best/max frame rate in pre game post steam setting that FeralInteractive put in is 40 rather than the 60 the screen does with the Windows version and 60 fps set in Ubuntu display properties.

I use the default Amdgpu drivers which, as I understand it for 19.04, are the only option. Launching the game complains about bad graphics with unsupported drivers. It’s like playing without Direct X . https://support.feralinteractive.com/docs/en/f12017/1.0.6/linux/faqs/?access=sptpkxywbb&utm_source=game_linux&utm_medium=link&utm_campaign=game_linux_f12017_support#i_linux_graphics_drivers

Noting that the F1 2018 and 2019 do not have Linux versions, so I am not expected any developments to fix it.

FFB addressed here, I will start another thread for that if I make any progress. Udev did not work for me. though the rules were installed .http://support.feralinteractive.com/en/mac-linux-games/dirt4/faqs/steering_wheels_udev_rules/

fbReader app goes monochrome and cannot revert to colors used before

I have a OnePlus 7 Pro model GM1915 which came with w/ Oxygen OS 9.5.8.GM31CB and Android 9.

One app, and only one app, causes the screen to go monochrome; the fbReader ebook reader. When I open an ebook, I see the text is colored, but within a second, it fades to white-on-black.

On prior Androids, specific colors could be assigned to the text. It makes no difference what I set with the OnePlus 7 Pro; any color I want, so long as it’s white. I have tried dozens of files which displayed in color before, including EPUB, MOBI, and PDF files, but all are monochrome.

When I exit the app or task-switch out, color returns slowly in about three seconds.

Uninstalling and reinstalling the app did not solve the problem.

Dell Monitor S2817Q goes into flicker mode on MacBook Pro (Retina, 15-inch, Mid 2015) 10.14.5

I have been using dual monitors (HP and Dell) with no issues on my MacBook Pro running 10.14.5 for 6 months. Dell is connected to HDMI and HP is connected to Thunderbolt. After a few recent OS updates I found that my Dell monitor will frequently drop into a flicker or flashing mode where screen blacks out for a fraction of a second every 2-5 seconds. Have tried all recommended solutions with no luck in finding a permanent fix. Curious if anyone has found a fix?

I did find that a power cycle on the Dell monitor (physically disconnect/reconnect power cord) will stop the flicker temporarily but the flicker typically returns 2-8 hours later.

How to monitor the traffic that goes thru my internet

I have a cable internet connection that goes to a ASA firewall and then into my local network where i have several machines including many VM’s on a esxi server. I am looking for a way to monitor mainly my internet traffic to see the most visited websites and the host that visited these sites. I am not able to put any agents or modify the settings on the devices connecting but I do control the wifi and and ASA. Thanks for any suggestions.

DoS attack Apache HTTP and all CPU goes 100%

We are getting a Dos attack on our web server. We enabled Cloudflare and add these rules:

If it is not SSL connection Block all. That fixed pretty much all attacks.

I would like to ask pros about this.

When I used that command :

netstat -npt | grep 80 | awk '{print $  5}' | grep -Eo '([0-9]{1,3}\.){3}[0-9]{1,3}' | cut -d: -f1 | sort | uniq -c | sort -nr | head 


 108 5.1xx.1x4.2x5  This is my server IP  59 1x8.1x4.1x1.1x1  50 162.1x8.38.196  40 1x2.x5x.93.1x9  38 1x2.1x8.226.94  37 x62.15x.88.248 

After seeing my server IP I really confused.

I block all connections to 80 port except cloudflare’s.

Right now, Some of my products I use, cannot query licenses from other servers due to blocking 80 ports.

I read some blogs it says SYN attack and my server sending response but not getting any response back so It use a lot of CPU.

How can I solve this problem with Iptables. I think attack is not big one so Iptables can handle If i use right rule.

thank you.