[Lubuntu] Weird Bug in LXTerminal

The bright white marks are privacy protection, everything else is some weird rendering bug that has repeated, usually when I'm sshed, but not necessarily into the same server.

What gives?

May be malware, virus, trojan.

Do you have screensavers enabled? They may be cause.

Or your system may have been hacked.

Looks more like a defective videocard or a buggy driver to me.

that.
also the "broken pipe" error looks serious. context?

I think it very well might be some kind of MitM malware attempting to overflow my terminal's framebuffer. I'm wondering if anyone else has seen something like it before.

Originally Posted by ondoho that. also the "broken pipe" error looks serious. context?

That happens when ssh misses a keep alive timeout. It's probably not a big deal.

Originally Posted by TobiSGD Looks more like a defective videocard or a buggy driver to me.

If it wasn't only happening in my terminal window while I was making ssh connections, I'd agree with you, but everything else is A-Okay.

Originally Posted by fu9ar I think it very well might be some kind of MitM malware attempting to overflow my terminal's framebuffer. I'm wondering if anyone else has seen something like it before.

Your terminal's framebuffer is not at all involved in SSH connections, they are text-only and not aware if they used in a terminal emulator or a plain CLI, let alone that they would know which terminal emulator and how to manipulate the framebuffer of the terminal emulator.
Try to play with visual settings of the terminal emulator, like transparency, background settings, ... .

I figure they could send all sorts of garbage to my terminal emulator through a hostile ssh connection, though.

I switched to urxvt in the interim, but I'll keep playing with this, also.

Originally Posted by fu9ar I figure they could send all sorts of garbage to my terminal emulator through a hostile ssh connection, though. I switched to urxvt in the interim, but I'll keep playing with this, also.

"Hostile ssh connection" corrupting local framebuffer or terminal emulator... that is a fair stretch to make if you will think about what that implies!

I think you should check your RAM and video hardware first, even though it is mostly limited to your terminal... and if it is only "mostly" the terminal when sshed, then what are the exceptions? After that I'd look for corrupted application packages.

Have you never "accidentally" catted out a big ugly binary file to stdout and had it corrupt your terminal, making it spit nothing but random garbage forever?

And by that I mean, when you had behavior where it looked like the font rendering table got garbled?

Originally Posted by fu9ar I figure they could send all sorts of garbage to my terminal emulator through a hostile ssh connection, though.

They could send Escape sequences. No Escape sequence I know would result in such display distortion. Still, it would be far fetched that they even know which terminal emulator you use and that they would make you aware of them by sending something that does nothing but distort the view in your terminal emulator. Think about it, if you would be the man in the middle, why would you do that instead of just intercepting the data to get access to valuable information?

Apparently, the men in the middle haven't broken ssh, if Appelbaum is to be trusted.

i must agree with the others - that kind of distortion points to something that is happening on your machine.
no kind of data transmitted through an ssh connection should be causing this.
the graphic driver comes to mind, but if it's only in the terminal, well first of all i'd try changing terminal emulators.
how's it with urxvt now?