Re: Deleted screen never reappears in GCM device panel

[Vivien Perez <vivien perez gmail com>]

Good evening Richard,

and thanks for your time.

I deleted the screen by using the Remove button in the Device panel. I'm using the ATI driver (fglrx 2:8.780-0ubuntu2).

I found the device-profiles.conf file, but it is empty, though I can add a printer, a camera or a scanner via the GUI.

I noticed that running "gcm-prefs -v" in a terminal gave an error message related to my screen's edid:
TI:21:49:53.860823    FI:gcm-client.c    FN:gcm_client_xrandr_add,607
 - failed to set for output: failed to parse edid

Then I tried "gcm-dump-edid", which gave me the same error:
Impossible d'analyser le contenu EDID: failed to parse header

When reading the bin file produced by this command, here is what I got:
ȯ>yȯ>y/
3x*TL�&PT�� �����@qO�:�q8- X,E��8KQ
      �SyncMaster
  �H9XSB02945
which obviously look weird.

I suspected my screen edid to be corrupted, but "get-edid | parse-edid " gives me a correct output:
vivien Fixe:~$ sudo get-edid | parse-edid
parse-edid: parse-edid version 2.0.0
get-edid: get-edid version 2.0.0

    Performing real mode VBE call
    Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
    Function supported
    Call successful

    VBE version 300
    VBE string at 0xc01f0 "ATI ATOMBIOS"

VBE/DDC service about to be called
    Report DDC capabilities

    Performing real mode VBE call
    Interrupt 0x10 ax=0x4f15 bx=0x0 cx=0x0
    Function supported
    Call successful

    Monitor and video card combination does not support DDC1 transfers
    Monitor and video card combination supports DDC2 transfers
    0 seconds per 128 byte EDID block transfer
    Screen is not blanked during DDC transfer

Reading next EDID block

VBE/DDC service about to be called
    Read EDID

    Performing real mode VBE call
    Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
    Function supported
    Call successful

parse-edid: EDID checksum passed.

    # EDID version 1 revision 3
Section "Monitor"
    # Block type: 2:0 3:fd
    # Block type: 2:0 3:fc
    Identifier "SyncMaster"
    VendorName "SAM"
    ModelName "SyncMaster"
    # Block type: 2:0 3:fd
    HorizSync 30-81
    VertRefresh 56-75
    # Max dot clock (video bandwidth) 170 MHz
    # Block type: 2:0 3:fc
    # Block type: 2:0 3:ff
    # DPMS capabilities: Active off:yes  Suspend:no  Standby:no

    Mode     "1920x1080"    # vfreq 60.000Hz, hfreq 67.500kHz
        DotClock    148.500000
        HTimings    1920 2008 2052 2200
        VTimings    1080 1084 1089 1125
        Flags    "+HSync" "+VSync"
    EndMode
    # Block type: 2:0 3:fd
    # Block type: 2:0 3:fc
    # Block type: 2:0 3:ff
EndSection

So I'm wondering whether my problem could be related to this edid issue.

Will gcm correctly detect my screen if I manually specify it in the device-profiles.conf file?

Thanks for your help,

Vivien

On 17/10/2010 20:58, Richard Hughes wrote:

On 16 October 2010 11:05, Vivien Perez <vivien perez gmail com> wrote:
  

I've have recently accidentally deleted the line concerning my screen in GCM
device panel. I haven't found a way to get it back in, since when I try to
add a device, the pop-up menu only proposes to add scanners, printers or
cameras.
    

How did you delete the screen? It shouldn't let you delete "connected"
devices. By just starting the GCM control panel it should "re-add"
devices as required. I'm a bit confused why GCM seems to have got
confused. Are you using the binary NVIDIA driver per-chance?

  

I have uninstalled and reinstalled GCM, but still no screen, and I didn't
find any option in GConf that could fix this.
    

The config is in device-profiles.conf in your home directory.

Richard