Re: kern/50060: kernel crash with i915drmksm on Intel 965Q

[christos%zoulas.com@localhost (Christos Zoulas)]

The following reply was made to PR kern/50060; it has been noted by GNATS.

From: christos%zoulas.com@localhost (Christos Zoulas)
To: Andreas Gustafsson <gson%gson.org@localhost>, gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/50060: kernel crash with i915drmksm on Intel 965Q
Date: Sun, 11 Oct 2015 12:33:16 -0400

 On Oct 11,  7:25pm, gson%gson.org@localhost (Andreas Gustafsson) wrote:
 -- Subject: Re: kern/50060: kernel crash with i915drmksm on Intel 965Q
 
 | I tried a -current kernel from source date 2015.10.10.19.35.15, which
 | includes christos' recent commit of i915_dma.c 1.18, but it also
 | paniced:
 | 
 |    pci0 at mainbus0 bus 0: configuration mode 1
 |    pchb0 at pci0 dev 0 function 0: vendor 8086 product 29a0 (rev. 0x02)
 |    agp0 at pchb0: i965-family chipset
 
 This seems to be a common problem:
 
 |    pci_mem_find: expected mem type 00000004, found 00000000
 |    pci_mem_find: expected mem type 00000004, found 00000000
 |    agp0: can't find MMIO registers
 
 |    ppb0 at pci0 dev 1 function 0: vendor 8086 product 29a1 (rev. 0x02)
 |    ppb0: PCI Express capability version 1 <Root Port of PCI-E Root Complex> x16 @ 2.5GT/s
 |    pci1 at ppb0 bus 1
 |    i915drmkms0 at pci0 dev 2 function 0: vendor 8086 product 29a2 (rev. 0x02)
 |    DRM error in i915_gmch_probe: failed to set up gmch
 |    uvm_fault(0xffffffff811b27a0, 0x7fc000357000, 2) -> e
 |    fatal page fault in supervisor mode
 |    trap type 6 code 2 rip ffffffff80a80c43 cs 8 rflags 10246 cr2 7fc000357000 ilevel 8 rsp ffffffff8137e7c8
 |    curlwp 0xffffffff8110d740 pid 0.1 lowest kstack 0xffffffff8137b2c0
 |    kernel: page fault trap, code=0
 |    Stopped in pid 0.1 (system) at  netbsd:_atomic_swap_64+0x3:     xchgq   %rax,0(%rdi)
 |    db{0}>
 
 Backtrace? Same as before?
 
 christos