Thanks for the comment, it's a great suggestion. The Intel documentation is really comprehensive (too bad that it didn't exist back when I was still using the tablet).
Yes, I knew s0ix. Unfortunately, the last time I've checked, s0ix had its own problems. Since then, I've given up and switched to a Thinkpad with coreboot. I just rechecked, it seems the s0ix bug is already resolved by a combination of BIOS update and a kernel parameter workaround, so suspend should finally be usable by now, hooray! Despite I'm not using it anymore, I'd still call it progress.
Yes, I knew s0ix. Unfortunately, the last time I've checked, s0ix had its own problems. Since then, I've given up and switched to a Thinkpad with coreboot. I just rechecked, it seems the s0ix bug is already resolved by a combination of BIOS update and a kernel parameter workaround, so suspend should finally be usable by now, hooray! Despite I'm not using it anymore, I'd still call it progress.