[Libdlo] Trying to use HP U610

[Csillag Kristof]

On 2014-09-30 13:20, Csillag Kristof wrote:

> What's the recommended way for getting this to work?
> Should I go back to the udlfb driver, instead of the udl?

Continuing my experiment log.

When using udlfb instead of udl, I could get X to work, but only on the
external screen.
(Attached Xorg config and log files with the "single" prefix.)

However, I couldn't get the Xinerama-based config to work
(as described here:
https://wiki.archlinux.org/index.php/DisplayLink#Xinerama_setup );
the X error message says

     "(EE) Cannot run in framebuffer mode. Please specify busIDs for all
framebuffer devices"

The confusing thing here is that
 * I have a BusId line in my xorg.conf
 * The same framebuffer device works all right, when I am not trying to
use Xinerama.
    What's the difference?

This sounds like the problem described in the Troubleshooting section, here:

https://wiki.archlinux.org/index.php/DisplayLink#Cannot_start_in_framebuffer_mode._Please_specify_busIDs_for_all_framebuffer_devices

But the suggested workaround does not seem to be working, and the
referenced X bug report
( https://bugs.freedesktop.org/show_bug.cgi?id=65384 ) is still open.

So, still no luck.

    Kristof

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 ################ DisplayLink ###################

Section "Device"
        Identifier      "DisplayLinkDevice"
        Driver          "fbdev" 
        BusID           "USB"
        Option          "fbdev" "/dev/fb1"  # change to whatever device you want to use
 #      Option          "rotate" "CCW"      # uncomment for rotation
EndSection
 
Section "Monitor"
       Identifier      "DisplayLinkMonitor"
EndSection
 
Section "Screen"
        Identifier      "DisplayLinkScreen"
        Device          "DisplayLinkDevice"
        Monitor         "DisplayLinkMonitor"
        DefaultDepth    16
EndSection

Section "ServerLayout"
  Identifier		"SingleLayout"
  Screen	0	"DisplayLinkScreen"
EndSection
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-------------- next part --------------
 ################ DisplayLink ###################

Section "Device"
	Identifier	"Radeon"
	Driver		"radeon"
EndSection

Section "Device"
        Identifier      "DisplayLinkDevice"
        Driver          "fbdev" 
        BusID           "USB"
        Option          "fbdev" "/dev/fb1"  # change to whatever device you want to use
 #      Option          "rotate" "CCW"      # uncomment for rotation
EndSection
 
Section "Monitor"
       Identifier      "DisplayLinkMonitor"
EndSection
 
Section "Screen"
        Identifier      "DisplayLinkScreen"
        Device          "DisplayLinkDevice"
        Monitor         "DisplayLinkMonitor"
        DefaultDepth    16
EndSection

Section "Screen"
    Identifier	"Internal"
    Device	"Radeon"
EndSection

Section "ServerLayout"
    Identifier		"DefaultLayout"
  Screen	0	"DisplayLinkScreen"
  Screen	1	"Internal" RightOf "DisplayLinkScreen"
  Option	"Xinerama"	"on"
EndSection

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