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task #7268: Use hardware signature to remember video settings

Submitted by:  Jean-Michel Philippe <jmphilippe>
Submitted on:  Thu Dec 9 09:36:08 2010  
Should Start On: Wed Dec 8 23:00:00 2010Should be Finished on: Tue Feb 8 23:00:00 2011
Category: SystemPriority: 5 - Normal
Status: DonePrivacy: Public
Percent Complete: 100%Assigned to: Jean-Michel Philippe <jmphilippe>
Open/Closed: ClosedEffort: 2.00

Thu Feb 10 12:41:08 2011, comment #4:

You currently need to have system persistence activated and, anyway, only configuration in /etc/X11/xorg.conf is saved. If you change screen resolution using the graphical interface (lxrandr), changes are never saved. We still need a shutdown screen for this feature…

Jean-Michel Philippe <jmphilippe>
Project AdministratorIn charge of this item.
Thu Feb 10 12:04:00 2011, comment #3:

Maybe this feature caused display chaos

Sergey <ipitgpu>
Project Member
Thu Feb 10 11:55:28 2011, comment #2:

Screen resolution is not saved

Sergey <ipitgpu>
Project Member
Thu Dec 9 09:39:06 2010, comment #1:

I forgot to note that the idea is to generate files names using the MD5 sum:


Then “/etc/X11/xorg.conf” would just be a symbolic link pointing to the correct configuration file. It would be nice to write comments in header of configuration files to tell what hardware it matches…

Jean-Michel Philippe <jmphilippe>
Project AdministratorIn charge of this item.
Thu Dec 9 09:36:08 2010, original submission:

Ticket https://gna.org/task/?7267 deals with the problem of using the correct video driver in Xorg configuration when a single video chipset from Intel, nVidia and eventually ATI is detected. In case of a complex video configuration (several chipset) or another chipset vendor advanced users may need to modify their Xorg configuration file but their work will be wiped at next reboot even if full persistence is activated (dexconf is run at each boot).

We propose to modify dexconf so that it uses hardware signatures to generate the Xorg configuration or to retrieve a previous one. For example the following command signs the combination of video chipset and monitor information:

$ sudo ddcprobe | md5sum | cut -d ' ' -f 1

We may also want to add lspci information:

$ echo $(sudo ddcprobe) $(lspci -m | grep -i vga) | md5sum | cut -d ' ' -f 1

Note that lspci also reports PCI slots so if you change your video card of slot, the MD5 signature changes too.

Jean-Michel Philippe <jmphilippe>
Project AdministratorIn charge of this item.


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Depends on the following items: None found

   bug dependencies.


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  • -unavailable- added by ipitgpu (Posted a comment)
  • -unavailable- added by jmphilippe (Submitted the item)

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    Follow 5 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Thu Mar 3 09:18:33 2011jmphilippeStatusReady For Test=>Done
    Sat Feb 19 16:34:56 2011jmphilippeStatusNone=>Ready For Test
      Percent Complete0%=>100%
      Assigned toNone=>jmphilippe
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