Re: kern/49495: serial console prevents use of X with drmkms

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

On Tue, Dec 23, 2014 at 06:36:33AM +1100, matthew green wrote:
> that gives me a login: prompt on the serial console as well as
> 4 virtual terminal logins on the display and then X runs on the
> 5th...

Just for the record, I also have

:0 local /usr/X11R7/bin/X :0 -noretro vt08

in /etc/X11/xdm/Xservers - which is why I have screen 7 - -

> this setup works for me with drmkms, but i've only got radeon
> PCI cards for testing here.

Would I be right in guessing that if the above were wrong, X without
the serial console wouldn't work? (It works without the serial console)

> is this i386 or amd64?  can you confirm that you only have one
> wsdisplay (wsdisplay0) and that wskbd0 and wsmux1 connect to it?

That is on amd64 with

$ dmesg | grep ws
wskbd0 at pckbd0: console keyboard
wsdisplay0 at intelfb0 kbdmux 1: console (default, vt100 emulation), using wskbd0
wsmux1: connecting to wsdisplay0
spdmem0: 12 rows, 13 cols, 8 log. banks, 2 phys. banks, 1.500ns cycle time
spdmem1: 12 rows, 13 cols, 8 log. banks, 2 phys. banks, 1.500ns cycle time
wsmouse0 at ums0 mux 0
wsdisplay0: screen 1 added (default, vt100 emulation)
wsdisplay0: screen 2 added (default, vt100 emulation)
wsdisplay0: screen 3 added (default, vt100 emulation)
wsdisplay0: screen 7 added (default, vt100 emulation)

Also:
i915drmkms0 at pci0 dev 2 function 0: Intel Ivy Bridge Integrated Graphics Device (rev. 0x09)




Now on a different machine: a Dell OptiPlex GX620 (as opposed to GX260)
running 25 Dec -current/amd64 with an additional radeon card, X works
with the serial console => this must be an intel specific problem.