[Bug 92478] New: xorg-server-1.17.2 no longer detects Radeon card: blank screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92478

            Bug ID: 92478
           Summary: xorg-server-1.17.2 no longer detects Radeon card:
                    blank screen
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: atoth at atoth.sote.hu
        QA Contact: xorg-team at lists.x.org

I experience the symptom on two systems (FirePro V4800 and FirePro M5950).
xorg-server-1.17.1 runs fine:
Upgrading to 1.17.2 results in blank screen.
relevant log snippet:
(II) modeset(G0): using drv /dev/dri/card0
(EE) No devices detected.

while 1.17.1 show this:
(WW) Falling back to old probe method for modesetting
(II) [KMS] Kernel modesetting enabled.
...

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