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Touchscreen works in live mode, but not after install

asked 2016-07-13 08:11:45 -0500

zkristic gravatar image

Hello, recently I've been playing with Linux on Thinkpad 10 2nd gen tablet. Currently Fedora is running on it. When I boot from USB stick (live mode), touchscreen works and is detected as Wacom 5020 HID, but after installing it touchscreen doesn't work, and is not detected by xinput.

Here is some info I got from both live image, and installed OS (@live and @install respectively):

lsusb

[user@live ~]$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 
Bus 001 Device 005: ID 046d:c31c Logitech, Inc. Keyboard K120
Bus 001 Device 004: ID 1c4f:0003 SiGma Micro 
Bus 001 Device 003: ID 125f:c03a A-DATA Technology Co., Ltd. 
Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation

[user@install ~]$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 
Bus 001 Device 004: ID 046d:c31c Logitech, Inc. Keyboard K120
Bus 001 Device 005: ID 1c4f:0003 SiGma Micro 
Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation

lspci

[user@live ~]$ lspci
00:00.0 Host bridge: Intel Corporation Braswell SoC Transaction Router (rev 20)
00:02.0 VGA compatible controller: Intel Corporation Braswell PCI Configuration Registers (rev 20)
00:03.0 Multimedia controller: Intel Corporation Braswell ISP Camera (rev 20)
00:0a.0 Non-VGA unclassified device: Intel Corporation Device 22d8 (rev 20)
00:0b.0 Signal processing controller: Intel Corporation Braswell P-Unit Power Management (rev 20)
00:14.0 USB controller: Intel Corporation Braswell USB xHCI Host Controller (rev 20)
00:1a.0 Encryption controller: Intel Corporation Braswell Trusted Execution Engine Interface (rev 20)
00:1c.0 PCI bridge: Intel Corporation Braswell PCIe Port 1 (rev 20)
00:1f.0 ISA bridge: Intel Corporation Braswell Platform Controller Unit LPC (rev 20)
01:00.0 Network controller: Broadcom Corporation BCM4356 802.11ac Wireless Network Adapter (rev 02)

[user@install ~]$ lspci
00:00.0 Host bridge: Intel Corporation Braswell SoC Transaction Router (rev 20)
00:02.0 VGA compatible controller: Intel Corporation Braswell PCI Configuration Registers (rev 20)
00:03.0 Multimedia controller: Intel Corporation Braswell ISP Camera (rev 20)
00:0a.0 Non-VGA unclassified device: Intel Corporation Device 22d8 (rev 20)
00:0b.0 Signal processing controller: Intel Corporation Braswell P-Unit Power Management (rev 20)
00:14.0 USB controller: Intel Corporation Braswell USB xHCI Host Controller (rev 20)
00:1a.0 Encryption controller: Intel Corporation Braswell Trusted Execution Engine Interface (rev 20)
00:1c.0 PCI bridge: Intel Corporation Braswell PCIe Port 1 (rev 20)
00:1f.0 ISA bridge: Intel Corporation Braswell Platform Controller Unit LPC (rev 20)
01:00.0 Network controller: Broadcom Corporation BCM4356 802.11ac Wireless Network Adapter (rev 02)

As you can see, apart the A-DATA live USB stick they're identical. After that I checked loaded modules:

lsmod

[user@live ~]$ lsmod
Module                  Size  Used by
ac97_bus               16384  1 snd_soc_core
acpi_pad               36864  0
acpi_thermal_rel       16384  1 int3400_thermal
auth_rpcgss ...
(more)
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answered 2016-09-10 19:24:01 -0500

Osndok gravatar image

I don't have a complete answer, but I can narrow it down a bit... As the following dmesg statement implies (which is not in your question), it seems that the kernel is unable to apply power to the touch screen:

acpi WCOM5020:00: Failed to change power state to D3hot

I look forward to a real/complete answer, as this effects me too!

If I had to guess (when comparing the dmesg of the live & installed versions), I would say that it has something to do with the multithreaded startup or overall wall-time... in that, when it boots from the really-fast mmc it gets a different order and the hardware has less time to "come alive" then when it boots from the comparatively slow USB key.

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Asked: 2016-07-13 08:11:45 -0500

Seen: 265 times

Last updated: Jul 13 '16