[Bug 101473] (SI) latest stable & cant boot - Invalid PCI ROM header structure: expecting 0xaa55, got 0x0000

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101473

            Bug ID: 101473
           Summary: (SI) latest stable & cant boot - Invalid PCI ROM
                    header structure: expecting 0xaa55, got 0x0000
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: qmastery16 at gmail.com

Created attachment 132011
  --> https://bugs.freedesktop.org/attachment.cgi?id=132011&action=edit
cut_here KERNEL PANIC

Trying to enable AMD R5-M230 Southern Islands (SI) laptop discrete GPU - by
using the latest stable 4.11.5 Linux Kernel and the latest Mesa 17.1.2 .
Already blacklisted radeon kernel module. However I can not boot with AMDGPU
after it is giving me these errors:

[drm] amdgpu kernel modesetting enabled.
[drm] initializing kernel modesetting (HAINAN 0x1002:0x6665 0x0000:0x0000
0x00).
[drm] register mmio base: 0xF0300000
[drm] register mmio size: 262144
amdgpu 0000:04:00.0: Invalid PCI ROM header signature: expecting 0xaa55, got
0x0000
[drm] vbios mem is null or mem size is wrong
amdgpu 0000:04:00.0: Invalid PCI ROM header signature: expecting 0xaa55, got
0x0000
[drm] vbios mem is null or mem size is wrong
[drm:amdgpu_get_bios [amdgpu]] *ERROR* Unable to locate a BIOS ROM
amdgpu 0000:04:00.0: Fatal error during GPU init
[drm] amdgpu: finishing device.

<=== KERNEL PANIC, "cut here" is inside the attachments

This is AMDGPU blocker issue, because I could boot only if I add "nomodeset" to
kernel parameters

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