kern/57540: nouveau GK107GLM autoconfiguration error (Thinkpad W541)

[jmclists%jmcunx.com@localhost]

>Number:         57540
>Category:       kern
>Synopsis:       nouveau GK107GLM autoconfiguration error (Thinkpad W541)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jul 23 20:25:00 +0000 2023
>Originator:     John McCue
>Release:        10.0 BETA
>Organization:
>Environment:
NetBSD neutron.jmcunx.com 10.0_BETA NetBSD 10.0_BETA (GENERIC) #0: Thu Jul 20 10:13:10 UTC 2023  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
On my Thinkpad W541, the nvidia fails to be configured, and it heats up.  If I disable nouveau during boot and it still gets hot.

>From dmesg:

[    98.790895] nouveau0: autoconfiguration error: error: fifo: LB_ERROR

[    98.790895] nouveau0: autoconfiguration error: error: fifo: PBDMA2: 00000800 [LBDAT_TIMEOUT] ch 1 [007f955000 DRM] subc 0 mthd 0000 data 00000000

dmesg and indent are here:

https://github.com/jmcunx/nconfig/blob/main/dmesg_w541.txt

https://github.com/jmcunx/nconfig/blob/main/ident_w541.txt


>How-To-Repeat:
just boot NetBSD
>Fix: