4 messages, 2 authors, 2014-03-22 · open the first message on its own page
From: Ivan Drobyshevskyi <hidden>
Date: 2014-03-21 14:30:15
Is there a way to make X treat Linux framebuffer device (e.g. /dev/fb0 backed by virtual framebuffer) as a real display? Ideally it should appear in system display settings as a configurable monitor. Does it require writing some kernel code or it's possible to somehow get away with for example X configuration? Thanks, Ivan.
From: Tormod Volden <hidden>
Date: 2014-03-21 20:27:27
On Fri, Mar 21, 2014 at 3:30 PM, Ivan Drobyshevskyi wrote:
Is there a way to make X treat Linux framebuffer device (e.g. /dev/fb0 backed by virtual framebuffer) as a real display? Ideally it should appear in system display settings as a configurable monitor. Does it require writing some kernel code or it's possible to somehow get away with for example X configuration?
If I understand your question correctly, you are asking for the xorg fbdev driver: http://www.x.org/releases/current/doc/man/man4/fbdev.4.xhtml HTH, Tormod
From: Ivan Drobyshevskyi <hidden>
Date: 2014-03-22 08:50:48
Thank you, that could work. As I understand, using fbdev doesn't support hotplug and the only way to setup it is via xorg.conf editing? (in short, I need to create a virtual GPU that is treated as a real one by desktop environment but instead of actual rendering only writing to framebuffer in RAM is required). On Fri, Mar 21, 2014 at 10:27 PM, Tormod Volden [off-list ref] wrote:
On Fri, Mar 21, 2014 at 3:30 PM, Ivan Drobyshevskyi wrote:quoted
Is there a way to make X treat Linux framebuffer device (e.g. /dev/fb0 backed by virtual framebuffer) as a real display? Ideally it should appear in system display settings as a configurable monitor. Does it require writing some kernel code or it's possible to somehow get away with for example X configuration?If I understand your question correctly, you are asking for the xorg fbdev driver: http://www.x.org/releases/current/doc/man/man4/fbdev.4.xhtml HTH, Tormod
From: Tormod Volden <hidden>
Date: 2014-03-22 10:39:53
quoted
On Fri, Mar 21, 2014 at 3:30 PM, Ivan Drobyshevskyi wrote:quoted
Is there a way to make X treat Linux framebuffer device (e.g. /dev/fb0 backed by virtual framebuffer) as a real display? Ideally it should appear in system display settings as a configurable monitor. Does it require writing some kernel code or it's possible to somehow get away with for example X configuration?If I understand your question correctly, you are asking for the xorg fbdev driver: http://www.x.org/releases/current/doc/man/man4/fbdev.4.xhtmlThank you, that could work. As I understand, using fbdev doesn't support hotplug and the only way to setup it is via xorg.conf editing? (in short, I need to create a virtual GPU that is treated as a real one by desktop environment but instead of actual rendering only writing to framebuffer in RAM is required).
Does it have to be a linux-fbdev driver? There are virtual xorg drivers (xf86-video-dummy?) or servers (Xfvb) that you can use like this, all in user-space. Or you create a DRM driver (à la the experimental SimpleDRM driver from dri-devel@lists.freedesktop.org) and use the xorg xf86-modesetting driver on top of it. However I don't know if these examples support the kind of hotplug you want in their current status. Tormod