[Bug 46725] New: Monitor "disconnected" and refuses to work anymore

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=46725

             Bug #: 46725
           Summary: Monitor "disconnected" and refuses to work anymore
    Classification: Unclassified
           Product: xorg
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: tomi.pievilainen+freedesktop at iki.fi
         QAContact: xorg-team at lists.x.org


Created attachment 57766
  --> https://bugs.freedesktop.org/attachment.cgi?id=57766
Xorg log with the disconnect event at the bottom

My monitor is SyncMaster 305Tplus connected to a DP-DLDVI adapter, which is
hooked to the dp port of my llano mb. The monitor won't accept any other
resolution than 2560x1600 and 1280x800, but EDID doesn't find those. To
compensate, I'm using these lines in my .xinitrc:

xrandr --newmode 2560x1600 268.00  2560 2608 2640 2720  1600 1603 1609 1646
+hsync -vsync
xrandr --addmode DisplayPort-0  2560x1600
xrandr --newmode "1280x800"x59.9   71.00  1280 1328 1360 1440  800 803 809 823
+hsync -vsync
xrandr --addmode DisplayPort-0  "1280x800"x59.9 
xrandr --output DisplayPort-0  --mode 2560x1600
xrandr --output DVI-0 --rotate left --auto --right-of DisplayPort-0

Today after closing a window, the monitor suddenly went dark. Xorg log seems to
show almost like it was rediscovered, or something, but trying to reset the
mode doesn't work:

$ xrandr --newmode 2560x1600 268.00  2560 2608 2640 2720  1600 1603 1609 1646
+hsync -vsync
X Error of failed request:  BadName (named color or font does not exist)
  Major opcode of failed request:  150 (RANDR)
  Minor opcode of failed request:  16 (RRCreateMode)
  Serial number of failed request:  29
  Current serial number in output stream:  29

Same with trying to add the 1280 mode. So I can't turn the monitor on without
rebooting. Not sure what happened there...

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