now, you got those people who post messages that say that their mouse is jerking around the place, or needs some threshold speed before it starts moving, or it just stays in one corner, or something erratic, and you got those people whose mice work properly coming in to help out. well, i think i might be in between. i have a laptop with a synaptics touchpad, as well as a logitech usb optical mouse. i've had quite a time getting the two to peacefully co-exist with one another, mainly by removing the gpm line from my graphical boot script , but now i seem to have run into a problem that i believe is native to x itself, or something even more general (kernel, maybe?). whenever i move either the mouse or the touchpad to within 50 pixels of the left side of the screen, the cursor jumps those 50 pixels straight to the edge, and when i bring it back, the cursor jumps again. it happens in kde and fluxbox. my input devices in XF86Config-4 are as follows.

Section "InputDevice"
Identifier "defkeyboard"
Driver "keyboard"
EndSection

Section "InputDevice"
Identifier "syntouchpad"
Driver "synaptics"
Option "Protocol" "auto-dev"
Option "Edges" "1900 5400 1900 4000"
Option "Finger" "25 30"
Option "MaxTapTime" "180"
Option "MaxTapMove" "220"
Option "VertScrollDelta" "100"
Option "MinSpeed" "0.02"
Option "MaxSpeed" "0.18"
Option "AccelFactor" "0.0010"
Option "ZAxisMapping" "4 5"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "false"
#Option "Emulate3Timeout" "70"
EndSection

Section "InputDevice"
Identifier "usbmouse"
Driver "mouse"
Option "Protocol" "ImPS/2"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5"
Option "Resolution" "800"
EndSection

if anyone can help out, i'd really appreciate it. don't hesitate to tell me that the solution is right in front of me .

I don't know for sure what is wrong. I would try the following two experiments:

1. copy Option "Edges" "1900 5400 1900 4000"
to the usbmouse section so that it appears in both mouse sections.

2. change Option "Edges" "1900 5400 1900 4000"
to Option "Edges" "1900 5400 1800 3900" and see if that works.

___________________________________
Be prepared. Create a LifeBoat CD.
http://users.rcn.com/srstites/LifeBo...home.page.html

Steve Stites

I kinda ignored this problem for a while but it's getting a little annoying now. I did what jailbait said, but it didn't work. My mouse cursor just jumps across the last 50 pixels or so before reaching the left side of the screen. It gets a little frustrating when I can't click the plus sign beside a directory in kfm. Anyhow, if anyone has any thoughts, please help me. Thanks!

it actually has something to do with the sis650 chipset, i figure, because the VESA device in XF86Config doesn't cause the same problem. here's the (long) sis part of my XF86Config:

Section "Device"
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
### [arg]: arg optional
#Option "SWcursor" # [<bool>]
Option "HWcursor" "true"
#Option "NoAccel" # [<bool>]
#Option "TurboQueue" # [<bool>]
#Option "FastVram" # [<bool>]
#Option "NoHostBus" # [<bool>]
#Option "RenderAcceleration" # [<bool>]
#Option "ForceCRT1Type" # <str>
#Option "ForceCRT2Type" # <str>
#Option "ShadowFB" # [<bool>]
#Option "DRI" # [<bool>]
#Option "AGPSize" # <i>
#Option "GARTSize" # <i>
#Option "Rotate" # <str>
#Option "NoXvideo" # [<bool>]
Option "Vesa" "true"
Option "MaxXFBMem" "12288"
#Option "ForceCRT1" # [<bool>]
Option "XvOnCRT1" "true"
#Option "PanelDelayCompensation" # <i>
#Option "EMI" # <i>
#Option "LVDSHL" # <i>
#Option "SpecialTiming" # <str>
#Option "TVStandard" # <str>
#Option "UseROMData" # [<bool>]
#Option "NoInternalModes" # [<bool>]
#Option "UseOEMData" # [<bool>]
#Option "NoYV12" # [<bool>]
#Option "CHTVType" # [<bool>]
#Option "CHTVOverscan" # [<bool>]
#Option "CHTVSuperOverscan" # [<bool>]
#Option "CHTVLumaBandwidthCVBS" # <i>
#Option "CHTVLumaBandwidthSVIDEO" # <i>
#Option "CHTVLumaFlickerFilter" # <i>
#Option "CHTVChromaBandwidth" # <i>
#Option "CHTVChromaFlickerFilter" # <i>
#Option "CHTVCVBSColor" # [<bool>]
#Option "CHTVTextEnhance" # <i>
#Option "CHTVContrast" # <i>
#Option "SISTVEdgeEnhance" # <i>
#Option "SISTVAntiFlicker" # <str>
#Option "SISTVSaturation" # <i>
#Option "SISTVCFilter" # [<bool>]
#Option "SISTVYFilter" # <i>
#Option "SISTVColorCalibFine" # <i>
#Option "SISTVColorCalibCoarse" # <i>
#Option "SISTVXScale" # <i>
#Option "SISTVYScale" # <i>
#Option "TVXPosOffset" # <i>
#Option "TVYPosOffset" # <i>
#Option "SIS6326TVAntiFlicker" # <str>
#Option "SIS6326TVEnableYFilter" # [<bool>]
#Option "SIS6326TVYFilterStrong" # [<bool>]
#Option "SIS6326TVForcePlug" # <str>
#Option "SIS6326FSCAdjust" # <i>
#Option "UseColorHWCursor" # [<bool>]
#Option "ColorHWCursorBlending" # [<bool>]
#Option "ColorHWCursorBlendThreshold" # <i>
#Option "RestoreBySetMode" # [<bool>]
#Option "NoCRT2Detection" # [<bool>]
#Option "ForceCRT2ReDetection" # [<bool>]
#Option "CRT1Gamma" # [<bool>]
#Option "CRT2Gamma" # [<bool>]
#Option "StoredGammaBrightness" # <str>
#Option "StoredGammaPreBrightness" # <str>
#Option "XvGamma" # <str>
#Option "XvDefaultContrast" # <i>
#Option "XvDefaultBrightness" # <i>
#Option "XvDefaultHue" # <i>
#Option "XvDefaultSaturation" # <i>
#Option "XvDefaultDisableGfx" # [<bool>]
#Option "XvDefaultDisableGfxLR" # [<bool>]
#Option "XvChromaMin" # <i>
#Option "XvChromaMax" # <i>
#Option "XvUseChromaKey" # [<bool>]
#Option "XvInsideChromaKey" # [<bool>]
#Option "XvYUVChromaKey" # [<bool>]
#Option "XvDisableColorKey" # [<bool>]
#Option "XvUseMemcpy" # [<bool>]
#Option "ScaleLCD" # [<bool>]
#Option "EnableHotkey" # [<bool>]
Option "EnableSiSCtrl" "true"
#Option "MergedFB" # [<bool>]
#Option "TwinView" # [<bool>]
#Option "MergedFBAuto" # [<bool>]
#Option "CRT2HSync" # <str>
#Option "SecondMonitorHorizSync" # <str>
#Option "CRT2VRefresh" # <str>
#Option "SecondMonitorVertRefresh" # <str>
#Option "CRT2Position" # <str>
#Option "TwinViewOrientation" # <str>
#Option "MetaModes" # <str>
#Option "MergedDPI" # <str>
#Option "NoMergedXinerama" # [<bool>]
#Option "NoTwinviewXineramaInfo" # [<bool>]
#Option "MergedXineramaCRT2IsScreen0" # [<bool>]
Identifier "sis650"
Driver "sis"
VendorName "Silicon Integrated Systems [SiS]"
BoardName "SiS650/651/M650/740 PCI/AGP VGA Display Adapter"
BusID "PCI:1:0:0"
EndSection

well, i solved the problem in case anyone in the future is interested. it all had to do with my sis chipset and not the mouse. in the above XF86Config-4 file, if one were to disable the VESA line, then the mouse will work just fine. but then you might have a yucky command line if you exit X. to solve that, you must install and properly configure sisfb from www.winischhofer.net. this is all thanks to thomas winischhofer, who's really done a great job of implementing stable and versatile software for the various sis graphics chipsets that are used in many embedded and portable computers.