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Date:      Sun, 14 Apr 2019 03:00:54 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 237271] Radeon video card no longer works on 12-STABLE
Message-ID:  <bug-237271-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D237271

            Bug ID: 237271
           Summary: Radeon video card no longer works on 12-STABLE
           Product: Base System
           Version: 12.0-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: sigsys@gmail.com

My Radeon RX 560 stopped working after a 12-STABLE update.  It coincides wi=
th
some DRM-related MFCs.  I nailed it down to r345932.  On r345929 (previous
revision affecting 12-STABLE), the card still works.  But starting from
r345932, loading the amdgpu.ko module prints some DRM console messages and =
then
the display freezes.  The system is still responsive afterward but it somet=
imes
panics with a page fault not long after.  That's with
graphics/drm-fbsd12.0-kmod (rebuilt after each update while testing).

Here are logs of the kernel messages when the card does not work:

        kernel: [48] <6>[drm] amdgpu kernel modesetting enabled.
        kernel: [48] drmn0: <drmn> on vgapci0
        kernel: [48] vgapci0: child drmn0 requested pci_enable_io
        syslogd: last message repeated 1 times
        kernel: [48] <6>[drm] initializing kernel modesetting (POLARIS11
0x1002:0x67FF 0x1462:0x8A91 0xCF).
        kernel: [48] <6>[drm] register mmio base: 0xFE900000
        kernel: [48] <6>[drm] register mmio size: 262144
        kernel: [48] <6>[drm] PCI I/O BAR is not found.
        kernel: [48] <6>[drm] probing gen 2 caps for device 1022:1453 =3D
737903/e
        kernel: [48] <6>[drm] probing mlw for device 1002:67ff =3D 400883
        kernel: [48] <6>[drm] UVD is enabled in VM mode
        kernel: [48] <6>[drm] UVD ENC is enabled in VM mode
        kernel: [48] <6>[drm] VCE enabled in VM mode
        kernel: [48] ATOM BIOS: 113-C994LP-S01
        kernel: [48] <6>[drm] vm size is 64 GB, 2 levels, block size is 10-=
bit,
fragment size is 9-bit
        kernel: [49] drmn0: successfully loaded firmware image with name:
amdgpu/polaris11_mc.bin
        kernel: [49] drmn0: VRAM: 4096M 0x000000F400000000 - 0x000000F4FFFF=
FFFF
(4096M used)
        kernel: [49] drmn0: GTT: 256M 0x0000000000000000 - 0x000000000FFFFF=
FF
        kernel: [49] Successfully added WC MTRR for [0xe0000000-0xefffffff]=
: 0;=20
        kernel: [49] <6>[drm] Detected VRAM RAM=3D4096M, BAR=3D256M
        kernel: [49] <6>[drm] RAM width 128bits GDDR5
        kernel: [49] [drm:amdgpu_ttm_global_init] Failed setting up TTM mem=
ory
accounting subsystem.
        kernel: [49] [drm:amdgpu_device_ip_init] sw_init of IP block <gmc_v=
8_0>
failed -12
        kernel: [49] drmn0: amdgpu_device_ip_init failed
        kernel: [49] drmn0: Fatal error during GPU init
        kernel: [49] <6>[drm] amdgpu: finishing device.
        kernel: [49] vgapci0: child drmn0 requested pci_disable_io
        syslogd: last message repeated 1 times
        kernel: [49] device_attach: drmn0 attach returned 12

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