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re: kern/49758: i386 radeondrmkms hangs machine on attachment
The following reply was made to PR kern/49758; it has been noted by GNATS.
From: "John D. Baker" <jdbaker%mylinuxisp.com@localhost>
Subject: re: kern/49758: i386 radeondrmkms hangs machine on attachment
Date: Sun, 26 Apr 2015 08:21:50 -0500 (CDT)
On Sat, 25 Apr 2015, matthew green wrote:
> > NetBSD 7.0_BETA (SLAB) #3: Wed Mar 18 12:20:54 CDT 2015
> > sysop%verthandi.technoskunk.fur@localhost:/d0/build/netbsd-7/obj/i386/sys/arch/i386/compile/SLAB
> does this kernel have LOCKDEBUG? if not, can you try with that?
No. I'll update, add that, and try again.
> i noticed that one of my systems with i386 kernels it sometimes is able
> to boot and sometimes it has a kernel lock spinout while vscons is drawing
> the text console at radeondrmkms attach time, and i wonder if perhaps you
> are seeing something similar that isn't caught, but just keeps spinning?
Lately, I can pretty reliably boot netbsd-7, but -current is problematic.
When it hangs this way, power-cycle is the only way to regain control.
Most recently (see kern/49710), rebooting a -current kernel after running
a netbsd-7 kernel hung the machine at radeondrmkms attach time displaying
a series of pairs of vertical green lines (which obviously should have
been kernel message text). Upon power-cycle, the next boot attempt was
(Actually, the first attempt panicked probing the IEEE1394 devices I
had plugged in at the time (PR to follow). I unplugged them and rebooted
and then it hung with the green lines. After power cycling, I was able
to boot the -current kernel successfully a few times in succession while
observing results for kern/49710.)
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