[Bug 60639] New: RV635: Kernel displays black screen when monitor is connect via DisplayPort

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=60639

            Bug ID: 60639
           Summary: RV635: Kernel displays black screen when monitor is
                    connect via DisplayPort
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.10.3 (and earlier)
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: kernspam at schreib-doch-mal-wieder.de
        Regression: No

When the monitor is connected via DisplayPort I can see grub but once the
kernel takes over, the screen goes black. When the same monitor is connected
via DVI
everything works.

Adding the kernel option "video=DP-1:1920x1200 at 75" makes at least the kernel
messages and virtual consoles work. However, when X starts the screen goes
black again. This might be related to the bug reported here:
https://bugzilla.novell.com/show_bug.cgi?id=752593

Modeline from EDID:
Detailed mode: Clock 154.000 MHz, 518 mm x 324 mm
               1920 1968 2000 2080 hborder 0
               1200 1203 1209 1235 vborder 0
               +hsync -vsync 
Monitor ranges (GTF): 50-61Hz V, 30-83kHz H, max dotclock 170MHz

Kernel 3.10.3 (but also tested with 3.9.x and 3.8.x)

Graphic chip: ATI Mobility FireGL V5700
(the second intel chip should be disabled)

-- 
You are receiving this mail because:
You are watching the assignee of the bug.