Arch Linux

Gullible Jones

Member

Registered: 2004-12-29

Posts: 4,863

KMS cursor freezes revisited

So, about a year after I first noticed it I'm still being vexed by a jumping, freezing cursor when starting or running certain applications (mostly wine, but FVWM seems to cause a lot of skipping too for some reason).

One of the things I noticed is that, every time the cursor freezes, I get this (or something very close) in Xorg.0.log:

[  3615.027] (II) intel(0): EDID vendor "LPL", prod id 42240
[  3615.027] (II) intel(0): Printing DDC gathered Modelines:
[  3615.027] (II) intel(0): Modeline "1280x800"x0.0   71.00  1280 1328 1360 1440  800 803 809 823 -hsync -vsync (49.3 kHz)

Can anyone tell me what that's about?

ThomasAdam

Member

From: Southampton, England

Registered: 2005-10-26

Posts: 148

Re: KMS cursor freezes revisited

So, about a year after I first noticed it I'm still being vexed by a jumping, freezing cursor when starting or running certain applications (mostly wine, but FVWM seems to cause a lot of skipping too for some reason).

One of the things I noticed is that, every time the cursor freezes, I get this (or something very close) in Xorg.0.log:

[  3615.027] (II) intel(0): EDID vendor "LPL", prod id 42240
[  3615.027] (II) intel(0): Printing DDC gathered Modelines:
[  3615.027] (II) intel(0): Modeline "1280x800"x0.0   71.00  1280 1328 1360 1440  800 803 809 823 -hsync -vsync (49.3 kHz)

Can anyone tell me what that's about?

That snippet from your Xorg log is a red-herring, so I'll ignore it.

Let's assume one thing from the outset:  It's nothing to do with your window manager.

So -- now that's covered, can you possibly give more accurate information about this cursor "freezing" problem -- what steps do you need to do to reproduce it?  Does it happen for only certain applications (of which I am doubtful), or any, and under what conditions does it most often happen?

-- Thomas Adam

Gullible Jones

Member

Registered: 2004-12-29

Posts: 4,863

Re: KMS cursor freezes revisited

Thanks... I'm not sure exactly what circumstances produce it. OpenGL seem to work fine now that I've disabled sync-to-vblank.

The most reliable way to reproduce it is as follows:
1. Run winecfg, wine explorer, or any Windows app under Wine
2. Move cursor around. Instead of moving smoothly the cursor will stop for about half a second, then jump in the direction I moved it. It will keep doing this until the whatever program has finished loading.

I have two machines with Intel video chipsets and this happens on both of them.

(To be honest though, now that I've got the OpenGL performance issue covered this isn't a big deal; these days I only use a few Windows apps, which are either games or replaceable.)