Re: ruby 2.6.0 oops+crash when accessing /dev/tty18

[Aivils S. <Aiv...@un...>]

Both ruby-CVS and linus-tree files are unchanged long time, so
i can jump from test9 to 2.6.0 without syncing.
My sugestion: make mrproper

>> Can You send to me /var/log/dmesg and System.map files.
>> Looks like matroxfb_crtc2 lacks in Your kernel.
>>
>Isn't that this line?
>matroxfb_crtc2: secondary head of fb0 was registered as fb1
>
>It doesn't seem to get any vc, not even when I drop the dumbcon.
>Trying to use X on vt17 when I don't have dumbcon hangs the
>machine immediately - not even sysrq caused any reaction so I
>had to use the reset button. Something is wrong when this happen.
>The vc should ideally work - or give me an ENODEV or similiar.
>
>All drivers are compiled into the kernel.

Now i understand. Your dmesg shows:
fbcon_startup: mode:   MATROX
fbcon_startup: visual: 2
fbcon_startup: res:    1280x1024-16
Console: switching to colour MATROX 160x64 vc:1-16
matroxfb_crtc2: secondary head of fb0 was registered as fb1

matroxfb_crtc2 registered after fbcon initialization. This order create
gcc when colect module_init(foo_bar) functions. Current ruby fbcon
set up console _only_ on registered framebuffer devices. No fbcon event
on fb-dev registration. Seems must be regitered additional VT, but
that is discutable.

Solution: matrox fb-dev compiled into kernel, fbcon as module.

Aivils Stoss