ImPS/2 ALPS GlidePoint (touchpad) incorrectly detected as PS/2 mouse on Dell E5420
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
On Dell E5420 in Ubuntu 11.04 the touchpad is detected by the kernel as a regular mouse, thus advanced touchpad features are not working.
Pointing and scrolling works, but not the other touchpad features, like ability to deactive while typing, ability deactivate when pressing Fn+F5 or dual point feature. Especially annoying since that my palm hits the touchpad all the time when I'm writing.
I just bought this Dell E5420 (http://
Debug info:
- Pressing Fn+F5 correctly flashes the touchpad icon on/off, but it has no real effect.
- Changing /desktop/
- xinput list shows touchpad detected as "ImPS/2 ALPS GlidePoint"
- $ xinput list-props "ImPS/2 ALPS GlidePoint" shows:
Device 'ImPS/2 ALPS GlidePoint':
Device Enabled (127): 0
Coordinate Transformation Matrix (129): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (247): 0
Device Accel Constant Deceleration (248): 1.000000
Device Accel Adaptive Deceleration (249): 1.000000
Device Accel Velocity Scaling (250): 10.000000
Evdev Axis Inversion (251): 0, 0
Evdev Axes Swap (253): 0
Axis Labels (254): "Rel X" (137), "Rel Y" (138)
Button Labels (255): "Button Left" (130), "Button Middle" (131), "Button Right" (132), "Button Wheel Up" (133), "Button Wheel Down" (134), "Button Horiz Wheel Left" (135), "Button Horiz Wheel Right" (136)
Evdev Middle Button Emulation (256): 0
Evdev Middle Button Timeout (257): 50
Evdev Wheel Emulation (258): 0
Evdev Wheel Emulation Axes (259): 0, 0, 4, 5
Evdev Wheel Emulation Inertia (260): 10
Evdev Wheel Emulation Timeout (261): 200
Evdev Wheel Emulation Button (262): 4
Evdev Drag Lock Buttons (263): 0
-> conclusion: mouse detected as normal mouse, not touchpad
In dmesg in can find:
[ 12.559359] alps.c: Enabled hardware quirk, falling back to psmouse-core
[ 12.572794] input: ImPS/2 ALPS GlidePoint as /devices/
Kernel:
Linux Latitude-E5420 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
Ubuntu 2.6.38-8.42-generic 2.6.38.2
Xorg does not anything about touchpad:
$ cat /var/log/Xorg.0.log | grep -i synaptics
$ cat /var/log/Xorg.0.log | grep -i touch
$ cat /var/log/Xorg.0.log | grep -i pad
The computer is only usable with external mouse and touchpad completely disabled with
xinput set-prop 13 "Device Enabled" 0
Possible related bug: https:/
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
Same bug on Dell Latitude E6410