[Openchrome-devel] [Bug 94277] New: driver does not detect VGA monitor, but there is one

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Feb 24 08:51:26 UTC 2016


            Bug ID: 94277
           Summary: driver does not detect VGA monitor, but there is one
           Product: xorg
           Version: git
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/openchrome
          Assignee: openchrome-devel at lists.freedesktop.org
          Reporter: bensberg at justemail.net

Created attachment 121938
  --> https://bugs.freedesktop.org/attachment.cgi?id=121938&action=edit
Xorg.0.log with forcibly "detected" output

Version 0.3.3 of the openchrome driver (or the one from git) does not detect
any monitor being connected to the VGA port.  But it has a TFT monitor
connected to it, that apparently does not have an EDID.  See below the snippet
where it tries to detect the output.  Setting the option "ActiveDevice" to
"CRT", or "VBEModes" to "True" doesn't help.

Attached is an Xorg.0.log where I have forced the output to being seen as
connected, with the attached brute-force patch.  Then I get an image on the
screen.  Things appear to work, but feel more sluggish than with the vesa
driver, probably because there is no drm support in the kernel.

[    22.058] (II) CHROME(0): ViaOutputsDetect
[    22.058] (**) CHROME(0): Option "PanelSize" "1280x1024"
[    22.058] (==) CHROME(0): LVDS-0 : Digital output bus width is 12 bits.
[    22.058] (==) CHROME(0): LVDS-0 : DVI Center is disabled.
[    22.058] (==) CHROME(0): LVDS Panel will not be forced.
[    22.058] (II) CHROME(0): ViaPanelGetNativeModeFromOption
[    22.058] (**) CHROME(0): LVDS Panel mode index is 4
[    22.058] (**) CHROME(0): Selected Panel Size is 1280x1024
[    22.058] (II) CHROME(0): Entered via_analog_init.
[    22.059] (II) CHROME(0): Output VGA-1 using monitor section Panel
[    22.059] (II) CHROME(0): Exiting via_analog_init.
[    22.059] (II) CHROME(0): Entered via_tv_init.
[    22.059] (--) CHROME(0): Did not detect a TV encoder.
[    22.059] (II) CHROME(0): Exiting via_tv_init.
[    22.059] (II) CHROME(0): Entered via_dvi_init.
[    22.060] (--) CHROME(0): VT1632A not found on I2C Bus 2 or I2C Bus 3.
[    22.060] (II) CHROME(0): Exiting via_dvi_init.
[    22.060] (II) CHROME(0): I2C device "I2C Bus 1:ddc2" registered at address
[    22.067] (--) CHROME(0): Test for CRT with VSYNC
[    22.067] (II) CHROME(0): EDID for output VGA-1
[    22.067] (II) CHROME(0): Output VGA-1 disconnected
[    22.067] (WW) CHROME(0): No outputs definitely connected, trying again...
[    22.067] (II) CHROME(0): Output VGA-1 disconnected
[    22.067] (WW) CHROME(0): Unable to find connected outputs - setting
1024x768 initial framebuffer
[    22.067] (II) CHROME(0): Using default gamma of (1.0, 1.0, 1.0) unless
otherwise stated.
[    22.067] (**) CHROME(0): Display dimensions: (375, 300) mm
[    22.067] (**) CHROME(0): DPI set to (69, 65)

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