Bug #761

Touchscreen not working

Added by Hammel about 1 year ago. Updated about 1 year ago.

Status:ClosedStart date:14 Jun 2020
Priority:ImmediateDue date:
Assignee:Hammel% Done:


Category:05 - Releases
Target version:1.1.0 - Upgrades
Severity:01 - Critical


rpi_ft5406 is not being loaded at boot time. But even if it is loaded, along with the backlight and evdev, the touchscreen is still not working.

Need to try the SD card with forced loading on different hardware to make sure this isn't a hardware problem.

Associated revisions

Revision 4881a2b8
Added by Hammel about 1 year ago

RM #761: Fall back to kernel 4.19.106 (and matching fw) because 4.19.122 broke touchscreens and 106 is the last known working version before PiBox release 1.1.0.


#1 Updated by Hammel about 1 year ago

  • Status changed from New to In Progress
  • % Done changed from 0 to 10

The last known working combination of kernel/firmware is

  • Kernel: git commit 216324a8655b7256961a378893f290d7fa1eecc4 (4.19.69)
  • fw: git commit 67bfaeb8457737053d8bab414d3d21c7587043cf
I may also try
  • kernel: git commit 742cb761fa7f2a25e9fc57afd72deb0c47b0c864 (4.19.106) or ecb440abef61d198478b6e598b3510ff6680090a (branch head at time of pull)
  • fw: git commit bf83b506b4a6f9e592e711d02871a278fad5bd1e

The former is running on a test touchscreen and everything works. The latter is in rpi4, so I can just try that build.

If either works (the newer the better) then I should revert to those and rebuild the kernel and rpi-firmware, sticking with those commit ids instead of using the head.

#2 Updated by Hammel about 1 year ago

  • % Done changed from 10 to 20

Just tested the 4.19.106 kernel and touchscreen works. I'm going to copy that one to the broken release and see if that works. If not, then I'll copy the firmware too.

#3 Updated by Hammel about 1 year ago

  • % Done changed from 20 to 70

Verified: 4.19.106 + fw works but 4.19.122 + fw does not.

The 1.1.0 release will use 4.19.106, as will future release until I can figure out what broke.

I've added the git ids to firmware and kernel builds. Need to push them and then rebuild: rpifw, kernel, buildroot, busybox. Since that's most of it I might as well just kick off a complete rebuild of everything to run overnight.

#4 Updated by Hammel about 1 year ago

  • Status changed from In Progress to Closed
  • % Done changed from 70 to 100

Rebuilds completed for both rpi2 and rpi1 and retested as passed.

Changes committed and pushed.

Closing issue.

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