Re: kern/56815: Lenovo ThinkCentre with i915drmkms graphics fails to boot -current

[Jarle Greipsland <jarle.greipsland%norid.no@localhost>]

The following reply was made to PR port-amd64/56815; it has been noted by GNATS.

From: Jarle Greipsland <jarle.greipsland%norid.no@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/56815: Lenovo ThinkCentre with i915drmkms graphics fails
 to boot -current
Date: Mon, 06 Jun 2022 08:55:28 +0200 (CEST)

 Taylor R Campbell <riastradh%NetBSD.org@localhost> writes:
 >  When it reboots, are you able to get the preceding boot's dmesg?
 Unfortunately, no.  The system doesn't reboot by itself.  It has
 to be power-cycled, so any dmesg remnants are lost.
 
 >  Can you try building a kernel with
 >  
 >  options 	DDB_ONPANIC=1
 >  options 	DDB_COMMANDONENTER="bt;ps;sync"
 >  
 >  and see if it produces a crash dump or dmesg from the preceding boot?
 >  Once it reboots, at the bootloader prompt, you can do
 I tried this, but the system just froze like before.  And there
 was no disk activitiy, so I don't think it was writing a crash
 dump either.
 
 >  Alternatively, do you have a serial console, e.g. via Intel AMT?  Can
 >  you get the console output via that?
 No.  There is no physical serial port, and no trace of any Intel
 AMT functionality in the documentation, in the BIOS or by
 pressing Ctrl-P during boot.  This is a small (Thinkcentre M-600)
 device, with a not-too-powerful CPU, so advanced functionality
 seems not to be included.
 					-jarle