Re: kern/52440: nouveau blank screen w/some cards after MSI change in 7.99.64

["John D. Baker" <jdbaker%consolidated.net@localhost>]

The following reply was made to PR kern/52440; it has been noted by GNATS.

From: "John D. Baker" <jdbaker%consolidated.net@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/52440: nouveau blank screen w/some cards after MSI change
 in 7.99.64
Date: Tue, 4 Feb 2020 14:47:54 -0600 (CST)

 Updating my -current live-USB flash drive and booting from it, thinking
 to save a crash dump, but instead finding that DDB's "dmesg" command
 worked and would let me see the panic messages, the complete panic
 message and backtrace is as follows:
 
 [...]
 kern.module.path=/stand/amd64/9.99.45/modules
 nouveau0: info: NVIDIA G94 (094100a1)
 nouveau0: info: bios: versopm 62.94.11.00.00
 panic: kernel diagnostic assertion "msipic_find_msi_pic_locked(mispic->mp_devid) == NULL" failed: file "/x/current/src/sys/arch/x86/pci/msipic.c", line 265
 cpu2: Begin traceback...
 vpanic() at netbsd:vpanic+0x178
 kern_assert() at netbsd:kern_assert+0x48
 msipic_construct_common_msi_pic() at netbsd:msipic_construct_common_msi_pic+0x307
 msipic_construct_msi_pic() at netbsd:msipic_construct_msi_pic+0x22
 pci_msi_alloc_common.part.2() at netbsd:pci_msi_alloc_common.part.2+0x22
 pci_msi_alloc_exact() at netbsd:pci_msi_alloc_exact+0x64
 pci_intr_alloc() at netbsd:pci_intr_alloc+0x152
 nvkm_pci_init() at netbsd:nvkm_pci_init+0x7a
 nvkm_subdev_init() at netbsd:nvkm_subdev_init+0x8d
 nvkm_device_init() at netbsd:nvkm_device_init+0x262
 nvkm_udevice_init() at netbsd:nvkm_udevice_init+0x4b
 nvkm_object_init() at netbsd:nvkm_object_init+0x62
 nvkm_ioctl_new() at netbsd:nvkm_ioctl_new+0x227
 nvkm_ioctl() at netbsd:nvkm_ioctl+0x10a
 nvif_object_init() at netbsd:nvif_object_init+0xb8
 nvif_device_init() at netbsd_nvif_device_init+0x11
 nouveau_drm_load() at netbsd:nouveau_drm_load+0xeb
 drm_dev_register() at netbsd:drm_dev_register+0xa5
 drm_pci_attach() at netbsd:drm_pci_attach+0x19e
 nouveau_pci_attach_real() at netbsd:nouveau_pci_attach_real+0xb1
 config_mountroot_thread() at netbsd:config_mountroot_thread+0x6f
 cpu2: End traceback...
 fatal breakpoint trap in supervisor mode
 trap type 1 code 0 rip 0x ffffffff8021f55d cs 0x8 rflags 0x202 cr2 0 ilevel 0 rsp 0xffffd000bf107900
 curlwp 0xffffb8b945386040 pid 0.77 lowest kstack 0xffffd000bf1042c0
 Stopped in pid 0.77 (system) at netbsd:breakpoint+0x5:  leave
 db{2}>
 
 -- 
 |/"\ John D. Baker, KN5UKS               NetBSD     Darwin/MacOS X
 |\ / jdbaker[snail]consolidated[flyspeck]net  OpenBSD            FreeBSD
 | X  No HTML/proprietary data in email.   BSD just sits there and works!
 |/ \ GPGkeyID:  D703 4A7E 479F 63F8 D3F4  BD99 9572 8F23 E4AD 1645