bugDoudouLinux - Bugs: bug #17228, monitor not detected

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bug #17228: monitor not detected

Submitted by:  Marian Vasile <marianvasile>
Submitted on:  Sun Dec 5 14:19:51 2010  
Category: SystemSeverity: 3 - Normal
Priority: 7 - HighStatus: In Progress
Privacy: PublicAssigned to: Jean-Michel Philippe <jmphilippe>
Open/Closed: OpenRelease: None

(Jump to the original submission Jump to the original submission)

Thu Dec 9 09:41:14 2010, comment #7:

See https://gna.org/task/?7267 and https://gna.org/task/?7268.

Jean-Michel Philippe <jmphilippe>
Project AdministratorIn charge of this item.
Tue Dec 7 12:45:32 2010, comment #6:

We could even record one Xorg configuration file per video hardware configuration by just appending the signature to the Xorg file name. This way DDL would remember Xorg settings even if you have used different hardware in the meantime :).

Jean-Michel Philippe <jmphilippe>
Project AdministratorIn charge of this item.
Mon Dec 6 09:46:20 2010, comment #5:

There is maybe a way to retrieve previous monitor and video card settings at boot time. We could record in a file a signature of hardware configuration for both video card and monitor. Then at boot time this file would be compared to a freshly computed signature. Xorg configuration would then be skipped if signatures are identical and Xorg configuration file already exists.

So I think we should create 3 tasks from this ticket:

1. ship a database of at least nVidia video cards supported by nv driver to force its use when such chipset is detected as the only video chipset
2. force Intel video driver as well when a single Intel chipset is detected
3. use a signature of hardware configuration for both video card and monitor at boot to preserve previous settings, especially for complex video settings

Jean-Michel Philippe <jmphilippe>
Project AdministratorIn charge of this item.
Sun Dec 5 21:26:13 2010, comment #4:

yes, you are right. it is better to generate graphic configuration at each startup, because the usb key or the CD might be used with other computers, being a toy that can be carried everywhere...:)

Marian Vasile <marianvasile>
Project Member
Sun Dec 5 21:14:04 2010, comment #3:

Good news. There are still strange things though: the resolution chosen seems to be 1280x1024@60Hz as monitor seems to support 1280x1024@75Hz too. He should then have selected the last one…

Moreover the nv driver says that he supports your card GeForce 6100 so I don't understand why it wasn't detected. Maybe a solution would be to have the list of supported nVidia cards in a text file and force use of this driver when lspci reports a video card in this list.

Concerning reboot with full persistence, I remember to have noticed this issue: the Xorg configuration file is regenerated at each startup. It is mandatory because as this is live system, there's no reason to boot on the same hardware configuration. So I really need to force nVidia at boot when video card is in the nVidia list. I should probably do the same for Intel cards for which I had the issue (NB: this may cause problems when there is an embedded video chipset and an additional video card).

Jean-Michel Philippe <jmphilippe>
Project AdministratorIn charge of this item.
Sun Dec 5 18:44:27 2010, comment #2:

After sudo video-driver nv and gdm restart, everything works fine. I attached below the new hardware report.
However,restarting the machine do not preserve the new settings, with the system data persistence activated (on the same usb key used for the main system).
The nv driver must be reloaded manually again, in order to obtain an working system.

(file #11479)

Marian Vasile <marianvasile>
Project Member
Sun Dec 5 15:58:25 2010, comment #1:

At a first glance it seems that Xorg has loaded the VESA driver instead of the Nvidia one. I don't understand how this can be possible since your hardware doesn't seem so recent ;). You can try to do the following to force Nvidia and see if this changes something (or not):

1. press Ctrl+Alt+F1 to switch to console mode only (you may have to wait for networking to be brought up before you get the console prompt)

2. type in the console “sudo video-driver nv” which modifies Xorg conf telling him to use the nv driver (this is a one shot command only, this tool is not able to remove the action of a previous invocation of itself…)

3. restart X typing “sudo /etc/init.d/gdm restart”

4. go back to X with Ctrl+Alt+F7 if it is not done automatically

Please repost a hardware report whatever the result.

Jean-Michel Philippe <jmphilippe>
Project AdministratorIn charge of this item.
Sun Dec 5 14:19:51 2010, original submission:

in some hardware configurations, LCD monitors are not detected, but the image is displayed.
it appears that no signal is detected, because the monitors enter in the sleep mode.

Marian Vasile <marianvasile>
Project Member


Attached Files
file #11479:  doudou-hwreport.gz added by marianvasile (22kB - application/x-gzip)
file #11476:  doudou-hwreport.gz added by marianvasile (18kB - application/x-gzip)


   task dependencies.

   bug dependencies.


Carbon-Copy List
  • -unavailable- added by jmphilippe (Posted a comment)
  • -unavailable- added by marianvasile (Submitted the item)

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    Follow 7 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Thu Dec 9 09:41:14 2010jmphilippeDependencies-=>Depends on task #7268
      Dependencies-=>Depends on task #7267
    Mon Dec 6 10:01:01 2010jmphilippeDependencies-=>bugs #17237 is dependent
    Sun Dec 5 18:44:27 2010marianvasileAttached File-=>Added doudou-hwreport.gz, #11479
    Sun Dec 5 15:58:25 2010jmphilippeStatusNone=>In Progress
      Assigned toNone=>jmphilippe
    Sun Dec 5 14:19:51 2010marianvasileAttached File-=>Added doudou-hwreport.gz, #11476
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