[Bug 52373] New: KMS makes screen black on ARUBA--TURKS hybrid device

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=52373

             Bug #: 52373
           Summary: KMS makes screen black on ARUBA--TURKS hybrid device
    Classification: Unclassified
           Product: DRI
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: reinkarn at gmail.com


Created attachment 64509
  --> https://bugs.freedesktop.org/attachment.cgi?id=64509
lspci

Just bought new Acer V3 notebook with hybrid AMD graphics, installed gentoo
without even Xs.
When booting with radeon.modeset=1, after loading radeon module screen goes
black (backlight is on, but nothing on the screen) (notebook works howewer, can
ssh into it), and dmesg shows two bad lines:

[drm:radeon_dp_link_train_ce] *ERROR* channel eq failed: 5 tries
[drm:radeon_dp_link_train_ce] *ERROR* channel eq failed

These lines repeat when hitting a key after backlight goes off for powersaving

When booting with no modesetting parameter, everything works fine.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.