Yes i did, all it says is "Invalid modeline"
Here's what i did (successfully removed an edid modeline from the edid pool and unsucessfully tried to add it again)
Code:
Gozer ~ # nv-control-dpy --print-used-modelines|grep -i edid
DFP-0: source=xserver, source=vesa, source=edid :: "nvidia-auto-select" 108.000 1280 1328 1440 1688 1024 1025 1028 1066 +HSync +VSync
DFP-0: source=xserver, source=vesa, source=edid :: "1280x1024_75" 135.000 1280 1296 1440 1688 1024 1025 1028 1066 +HSync +VSync
DFP-0: source=xserver, source=vesa, source=edid :: "1280x960_60" 108.000 1280 1376 1488 1800 960 961 964 1000 +HSync +VSync
DFP-0: source=xserver, source=vesa, source=edid :: "1152x864" 108.000 1152 1216 1344 1600 864 865 868 900 +HSync +VSync
DFP-0: source=xserver, source=vesa, source=edid :: "1024x768_75" 78.750 1024 1040 1136 1312 768 769 772 800 +HSync +VSync
DFP-0: source=xserver, source=vesa, source=edid :: "1024x768_70" 75.000 1024 1048 1184 1328 768 771 777 806 -HSync -VSync
DFP-0: source=xserver, source=vesa, source=edid :: "1024x768_60" 65.000 1024 1048 1184 1344 768 771 777 806 -HSync -VSync
DFP-0: source=xserver, source=vesa, source=edid :: "800x600_75" 49.500 800 816 896 1056 600 601 604 625 +HSync +VSync
DFP-0: source=xserver, source=vesa, source=edid :: "800x600_72" 50.000 800 856 976 1040 600 637 643 666 +HSync +VSync
DFP-0: source=xserver, source=vesa, source=edid :: "800x600_60" 40.000 800 840 968 1056 600 601 605 628 +HSync +VSync
DFP-0: source=xserver, source=vesa, source=edid :: "800x600_56" 36.000 800 824 896 1024 600 601 603 625 +HSync +VSync
DFP-0: source=xserver, source=vesa, source=edid :: "640x480_75" 31.500 640 656 720 840 480 481 484 500 -HSync -VSync
DFP-0: source=edid :: "640x480_73" 31.500 640 656 696 832 480 481 484 520 -HSync -VSync
DFP-0: source=edid :: "640x480_60" 25.180 640 648 744 800 480 482 484 525 -HSync -VSync
Gozer ~ # nv-control-dpy --delete-modeline 0x00010000 "1024x768_70"
Using NV-CONTROL extension 1.27 on :1
Connected Display Devices:
DFP-0 (0x00010000): Samsung SyncMaster
DFP-1 (0x00020000): Samsung SyncMaster
Deleted modeline "1024x768_70" from DFP-0's mode pool.
Gozer ~ # nv-control-dpy --add-modeline 0x00010000 "1024x768_70" 75.000 1024 1048 1184 1328 768 771 777 806 -HSync -VSync
Using NV-CONTROL extension 1.27 on :1
Connected Display Devices:
DFP-0 (0x00010000): Samsung SyncMaster
DFP-1 (0x00020000): Samsung SyncMaster
Failed to add the modeline "1024x768_70" to DFP-0's mode pool.
Gozer ~ # nv-control-dpy --add-modeline 0x00010000 "1024x768_70" "75.000 1024 1048 1184 1328 768 771 777 806 -HSync -VSync"
Using NV-CONTROL extension 1.27 on :1
Connected Display Devices:
DFP-0 (0x00010000): Samsung SyncMaster
DFP-1 (0x00020000): Samsung SyncMaster
Failed to add the modeline "1024x768_70" to DFP-0's mode pool.
Gozer ~ # nv-control-dpy --add-modeline 0x00010000 "1024x768_70 75.000 1024 1048 1184 1328 768 771 777 806 -HSync -VSync"
Using NV-CONTROL extension 1.27 on :1
Connected Display Devices:
DFP-0 (0x00010000): Samsung SyncMaster
DFP-1 (0x00020000): Samsung SyncMaster
Failed to add the modeline "1024x768_70 75.000 1024 1048 1184 1328 768 771 777 806 -HSync -VSync" to DFP-0's mode pool.
Code:
Gozer ~ # tail /var/log/Xorg.1.log
[355601.374] (II) AT Translated Set 2 keyboard: Configuring as keyboard
[355601.374] (II) XINPUT: Adding extended input device "AT Translated Set 2 keyboard" (type: KEYBOARD)
[355601.374] (**) Option "xkb_rules" "evdev"
[355601.374] (**) Option "xkb_model" "evdev"
[355601.374] (**) Option "xkb_layout" "it"
[355601.374] (II) XKB: Reusing cached keymap
[355766.637] (WW) NVIDIA(0): Invalid ModeLine "1024x768_70"
[355784.359] (WW) NVIDIA(0): Invalid ModeLine "1024x768_70"
[355791.730] (WW) NVIDIA(0): Invalid ModeLine "1024x768_70 75.000 1024 1048 1184 1328
[355791.730] (WW) NVIDIA(0): 768 771 777 806 -HSync -VSync"