Description of problem: I have an HP TC1100 tablet where the screen is a serial Wacom tablet. If the CONFIG_SERIAL_8250_ACPI were enabled, this hardware (and others) would be functional. This feature is not available as a module. How reproducible: Always. Recompiling the kernel with this option enabled allows the device to work fine. Steps to Reproduce: 1. N/A - device is not recognized by default Fedora kernel Actual results: Device is not recognized. Expected results: Device should be recognized. Additional info: If there's no good reason for this to be off, let's turn it on.
this option just affects how serial ports are discovered, and the regular methods should work just fine for that. The last time we switched this on, it actually broke some working systems (The joys of trusting BIOS writers). I did some googling. Did you perhaps mean SERIAL_WACOM_ACPI ? There's an out-of-tree patch that adds that option, which sounds promising, as it has the description "Enable a wacom digitizer on an HP TC1100" I suggest talking with its upstream author Chris Kemp <ck231.uk> to try and get that included in the kernel.org tree, and Fedora will pick it up on the next rebase.