When your OS goes crazy - Screenshots

[pdurlej]

Obviously, my OS does not crash frequently enough.

[Andy1988]

Turns out it's actually a bug with QEMU's Cocoa frontend, it works fine anywhere else

Argh! I can confirm this.
I chased a bug in my VBE code for a few days and didn't find anything. This explains why.

Also, have a look at this screenshot:
http://lockerz.com/s/120621654
On the left side you can see VMware, VirtualBox is in the middle and qemu on the right.
All created by the same code, counting a 16 bit integer from 1 up and using it as a color value. Something is not right there

[rdos]

How do people manage to get pictures from a crashed OS? Is it because they run on emulators rather than real hardware?

[rdos]

I got it!

An OS crash with Bochs:



Updated bochs panic screen with the newest version:

Divide error Sing Gdt 0000
EAX=0007EEA0 EBX=00000FC4 ECXÂ010D18C7 EDX=00000000 ESI=00000000 EDI=00000000
EPC=0000C0EF ESP=00000800 EBP=00007B00 NC PE NA ZR PL EI UP NV PR PM
CS=0030 SS=0188 DS=EEA0 ES=0030 FS=F040 GS=0000

Bochs log:

00434348346e[CPU0 ] LLDT: doesn't point to an LDT descriptor!

I'm absolutely certain that this is an emulation error, and not something real!

[Combuster]

How do people manage to get pictures from a crashed OS? Is it because they run on emulators rather than real hardware?

Yes, it's the easiest way. I for one lack a good camera to show off all the bugs in my video drivers (including some that would need an audio recording)...

[jal]

I'm absolutely certain that this is an emulation error, and not something real!

While there are bugs in bochs, I very much doubt whether you're right :).


JAL

[shikhin]

Hi,

(including some that would need an audio recording)...

Wondering whether that's because of the monitor bursting, or the neighbors screaming due to the fire..

Coming back to the topic, I got some really stupid bugs with me, though I forgot to take screenshots. One of these is that I switched to mode 0x12 instead of 0x13, and kept wondering why everything was so borked up..

Regards,
Shikhin

[Oranos]

(including some that would need an audio recording)...

Wondering whether that's because of the monitor bursting, or the neighbors screaming due to the fire..

[VolTeK]

Wondering whether that's because of the monitor bursting

Was once told of a chip in CRT screens that if malfunctioning, blinds viewers? Or just explodes either one sucks

[turdus]

I've made many modifications in threading lately, and it works fine with apic timer. So I was wondering what's with the good old PIT driver? It should make no difference, but I gave it a try, so I recompiled my kernel in legacy mode (hence the "L" in the right upper corner of screen). As it turned out, after a couple of thread switches, it suddenly messes up the stack very badly, that leads to executing an error message string in a different method...

I'm not sure whether debugging worth it, maybe it's time to drop PIT support?

p.s. for those in doubt: you can relax, this screen is not a fake.

[Kazinsal]

Was once told of a chip in CRT screens that if malfunctioning, blinds viewers? Or just explodes either one sucks

Either one is also an interesting and unique way to deal with those annoying neighbours...


@turdus: Are you using a custom font to display those little logos in the bottom corners of the screen?

[turdus]

@turdus: Are you using a custom font to display those little logos in the bottom corners of the screen?

Yep. I've written a small javascript utility to generate bitmap in source format (asm, c and pascal). I've draw the logo with it and copy'n'paste the code into my source. You can set it up via BIOS (see RBIL) or directly programming vga registers.

[ben1066]

Forgot to change my console functions to account for a bigger framebuffer.

[Chandra]

Forgot to change my console functions to account for a bigger framebuffer.

Doesn't really look like the OS going crazy. Just some mis-aligned texts.

[ben1066]

Forgot to change my console functions to account for a bigger framebuffer.

Doesn't really look like the OS going crazy. Just some mis-aligned texts.

It's the closest to crazy my OS gets, which, for the most part, is a good thing