The system is not able to detect the touchsreen

[Scorpion]

I' m using a tablet that is sold with Windows 10.
The firmware extracted from the special driver are already available here https://github.com/onitake/gsl-firmware/tree/master/firmware/trekstor/surftab7old.
(I discovered that the Mediacom drivers are the same as those for TrekStor, a company that also works with Mediacom.Mediacom Winpad 7.0 W700 corresponds at SurfTab wintron 7.0 ST70416-6).
That repository states that i need to recompile the kernel.
I don' t know how here https://unix.stackexchange.com/questions/466571/recompile-a-kernel-including-a-firmware?noredirect=1#comment850048_466571 there is my question about this problem.
It would be nice if the linux-kernel would support the tablet touchscreen by default.
My kernel is 4.15.0-33-generic.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-33-generic 4.15.0-33.36
ProcVersionSignature: Ubuntu 4.15.0-33.36-generic 4.15.18
Uname: Linux 4.15.0-33-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.15.0-33-generic.
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 1: bytcrrt5651 [bytcr-rt5651], device 0: 3 []
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: vegito 1554 F.... pulseaudio
 /dev/snd/controlC0: vegito 1554 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Audio'/'Intel HDMI/DP LPE Audio'
   Mixer name : ''
   Components : ''
   Controls : 11
   Simple ctrls : 1
Card1.Amixer.info:
 Card hw:1 'bytcrrt5651'/'bytcr-rt5651'
   Mixer name : ''
   Components : ''
   Controls : 243
   Simple ctrls : 213
CurrentDesktop: LXDE
Date: Tue Sep 4 09:57:45 2018
HibernationDevice: RESUME=UUID=f8f953f2-ceb9-4989-9564-a4ba2fed3fd4
InstallationDate: Installed on 2018-08-21 (13 days ago)
InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 007: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
 Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: MEDIACOM WinPad 7 W10 - WPW700
PciMultimedia:

ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-33-generic root=/dev/mapper/lubuntu--vg-root ro quiet splash vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-33-generic N/A
 linux-backports-modules-4.15.0-33-generic N/A
 linux-firmware 1.173.1
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
StagingDrivers: r8723bs
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/16/2015
dmi.bios.vendor: INSYDE Corp.
dmi.bios.version: MC.G.WI71C.MGBMRBA03
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: Type2 - Board Product Name
dmi.board.vendor: Type2 - Board Manufacturer
dmi.board.version: Type2 - Board Version
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnINSYDECorp.:bvrMC.G.WI71C.MGBMRBA03:bd11/16/2015:svnMEDIACOM:pnWinPad7W10-WPW700:pvrType1-TBDbyOEM:rvnType2-BoardManufacturer:rnType2-BoardProductName:rvrType2-BoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.family: Type1 - Family
dmi.product.name: WinPad 7 W10 - WPW700
dmi.product.version: Type1 - TBD by OEM
dmi.sys.vendor: MEDIACOM

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.19 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.19-rc2

[Scorpion (scorpion2185)]

Thanks to owner of the repository we found the solution adding this to the drivers/platform/x86/silead_dmi.c:
First this section
but is optional if i understood right the important things is to have a DMI match:
static const struct property_entry mediacom_w700_props[] = {
 PROPERTY_ENTRY_U32("touchscreen-size-x", 884),
 PROPERTY_ENTRY_U32("touchscreen-size-y", 632),
 PROPERTY_ENTRY_STRING("firmware-name",
         "gsl1686-surftab-wintron70-st70416-6.fw"),
 PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 PROPERTY_ENTRY_BOOL("silead,home-button"),
 { }
};
The the DMI_MARTCH section:
  {
  /* Mediacom WinPad 7.0 W700 */
  .driver_data = (void *)&surftab_wintron70_st70416_6_data,
  .matches = {
   DMI_MATCH(DMI_SYS_VENDOR, "MEDIACOM"),
          DMI_MATCH(DMI_PRODUCT_NAME, "WinPad 7 W10 - WPW700"),
  },
 },

[Scorpion (scorpion2185)]

And you must have the firmware in /lib/firmware/silead/<your_custom_firmware_name>.fw.

So you can add the firmware to the official kernel? https://github.com/onitake/gsl-firmware/tree/master/firmware/linux

[Scorpion (scorpion2185)]

Thanks to this project https://linuxiumcomau.blogspot.com/2017/06/customizing-ubuntu-isos-documentation.html
I reinstalled the OS with the upgrade kernel option the kernel is now: 4.19.0-041900rc7-generic