<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> <title></title> </head> <body bgcolor="#ffffff" text="#000000"> 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: <blockquote cite="mid:AANLkTim63mnzg9MDD6Np+M88QYG9XSX1uzyMwaqCJgZ9@mail.gmail.com" type="cite"> <pre wrap="">On 16 October 2010 11:05, Vivien Perez <a class="moz-txt-link-rfc2396E" href="mailto:vivien.perez@gmail.com"><vivien.perez@gmail.com></a> wrote: </pre> <blockquote type="cite"> <pre wrap="">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. </pre> </blockquote> <pre wrap=""> 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? </pre> <blockquote type="cite"> <pre wrap="">I have uninstalled and reinstalled GCM, but still no screen, and I didn't find any option in GConf that could fix this. </pre> </blockquote> <pre wrap=""> The config is in device-profiles.conf in your home directory. Richard </pre> </blockquote> </body> </html>