Touchscreen Issues on a Dell Latitude 9510

User Support Hardware Issues
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I’m happy to say that after tweaking the BIOS settings a bit, I have gotten this Dell Latitude 9510 working pretty well with Qubes-OS!

One nagging problem it has is the touchscreen does not work after coming back from suspend. Qubes seems to recognize the touch input on first boot with no problem, seeing the touchscreen as a Wacom tablet. Unloading and reloading the wacom and wacom_w8001 modules does not solve the problem, neither does disabling Thunderbolt in the BIOS, as I saw suggested for similar troubles. The touchscreen does not show up with lsusb or lspci, so I’m not sure what bus it uses internally. It shows up with the libinput --list-devices command, even when it does not work.

I am happy to post any information you think may be relevant in resolving the issue.

It may be noteworthy that I changed /etc/default/grub to have the “mem_sleep_default=deep” option at the end of the “GRUB_CMNDLINE_LINUX” line, but it still does not consistently wake from sleep in a timely manner.

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I’m curious by what you mean when you say you tweaked the BIOS settings. In what way? I ask in the event that I ever need to do this.

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I admit I was not very methodical. Mostly, I looked for anything performance-related and turned it to high. I also enabled c-states. I believe I had to disable something related to run-time power management initially to run the installer. If you need a more exact list of how I have it set now, I can try to make one, it’s just a lot to go through.

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