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[Bug 1574594] Missing required logs.
This bug is missing log files that will aid in diagnosing the problem.
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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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Touchscreen working in live system but not after installation
Status in linux package in Ubuntu:
When I start Ubuntu 16.04 from USB on a Dell Venue 11 Pro 7139 the
touchscreen works well. After installing and re-starting the system
the touch support is completely gone. As far as I can see, all modules
are loaded in life system as well as in installed system. There seem
to be no differences in kernel versions and start options as well.
The Xorg-logs of the live and the installed system show no major
differences except different numbers of the event-files in /dev/input.
Both systems recognize the Synaptics device as touchscreen: (II)
evdev: SYNA7500:00 06CB:3AF0: Configuring as touchscreen.
The main difference are thousands of evbug entries like the following
two in the kern.log of the installed system while none are reported in
the live system.
Apr 25 14:10:05 uwe-Venue-11-Pro-7139 kernel: [ 61.288764] evbug: Event. Dev: input7, Type: 0, Code: 0, Value: 0
Apr 25 14:10:05 uwe-Venue-11-Pro-7139 kernel: [ 61.406747] evbug: Event. Dev: input7, Type: 3, Code: 57, Value: 44.
They appear every time I use the touchpad. So I think the detection of
input devices is kind of faulty in the installed system.
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