I've been hacking on an ancient #thinkpad r50e. Despite best efforts, I can't get the thing to wake up properly from suspend or hibernate.
Goes to bed as expected, and won't wake up.
Would love some help if you have any ideas.
Debian minimal install with i3wm. Acpi appears functional, acpi-support configured correctly by every guide I could find.
I'm stumped at this point, and not closing the lid without a plan. :)
According to https://www.linuxcompatible.org/compatdb/details/ibm_thinkpad_r50e_linux.html it used to work.
1. Make sure the BIOS/CMOS settings aren't bad. Since it used to work for people without effort, it points to the default settings being safe. Sometimes "better" settings are buggy, so use defaults. (*)
2. Possible issues due to changes in kernel configuration settings. You should be able to easily try changing the prebuilt kernel you're using. You might need to build your own, though.
(*) HDD settings should be preserved.
And when I say, "HDD settings should be preserved" there are BIOS/CMOS settings that change how the OS sees your hard disk and if things are misaligned the system won't boot. This isn't an issue if you're going to reinstall the system, but should not be considered if you want to preserve things.
Have you checked the logs after the suspend? Are you sure it is successfully suspending? It would be interesting if it never _quite_ completed the suspend operation, and then couldn't resume.
According to https://askubuntu.com/questions/279584/suspend-resume-failure sometimes WiFi or graphics cards can mess with suspend/resume. Since it is a laptop, I don't expect a graphics issue, but you might try shutting down the WiFi before you try suspending.
It appears it is suspending but the screen isn't turning back on during resume.
Oh? That's something that should be fixable. Let me see if I can find that...
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