Disper does not work since upgrade to new Nvidia driver (302.17)

[Ulrich Lichtenegger]

Disper worked well on my Thinkpad t410 with Nvidia Driver 295. I upgraded to version 302.17 from the Ubuntu X Updates PPA (https://launchpad.net/~ubuntu-x-swat/+archive/x-updates/) and now, disper has some problems:

Trying to use the command disper -S, it says:
resolutions of DFP-2: 640x480, 800x600, 1024x768, 1152x864, 1280x960, 1280x1024, 1600x1200, 1920x1200
setting xinerama info order: DFP-2
deleting dangling metamode 51: source=nv-control, id=51, switchable=no :: DFP-0: 1440x900 @1440x900 +0+0, DFP-2: 1920x1200 @1920x1200 +1440+0
deletion of dangling metamode 51 failed
deleting dangling metamode 53: source=nv-control, id=53, switchable=no :: DFP-0: 1440x900 @1440x900 +0+0
deletion of dangling metamode 53 failed
could not switch to metamode 52: resolution not found

But the resolutions are there:
disper -l
display DFP-0: Lenovo Group Limited
 resolutions: 1440x900
display DFP-2: Samsung SyncMaster
 resolutions: 640x480, 800x600, 1024x768, 1152x864, 1280x960, 1280x1024, 1600x1200, 1920x1200

DFP-2 is connected to my Docking Station.

My Disper version is:
disper --version
disper 0.3.0

Switching to the external DIsplay works well with nvidia-xconfig and also does with the KDE-Display Software thanks to new RandR Support in Nvidia Driver 302

You can find my Nvidia-Bug-Report.sh script output attached.

[wvengen (wvengen)]

Thanks for your bug report! I'm sorry it took a while to catch up, but I've updated bzr trunk to fallback to XRandR when the NVidia kernel driver version >= 300. Would you mind testing?

[Ulrich Lichtenegger (ulilicht)]

Thank you for the update! Unfortunately i cannot test this because i am travelling until december and therefor i don't have a second monitor.
Cheers

[Jacob Beck (beckjake)]

I tested this on an OpenSuSE 12.2, x86_64. I'm using nVidia driver version 304.43.

The new change works and doesn't show any of the 'deletion of dangling metamode X failed' errors, so it appears to have worked. Great fix, thanks!

However, when I do a "dipser -s" I now get the wrong screen set, so I can't use the trunk version. I will open a new issue for this as I believe it to be unrelated.

[wvengen (wvengen)]

Selection of the correct backend appears to be working, please add a comment if you stil find the nVidia backend to be used for newer nVidia cards (which should use the XRandR backend).