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https://www.linuxquestions.org/questions/debian-26/no-apm-support-in-kernel-266977/
Dec 17, 2004 · No APM support in kernel. Hi, ... APM is not compiled into your kernel. See kernel-compile-threads in this forum to get a start on compiling your own kernel. ... Now I have to investigate how can I give permissions to users to suspend, but that shouldn't be so difficult I guess.
https://www.kernel.org/doc/html/latest/power/basic-pm-debugging.html
First, if there is a serial port in your box, you can boot the kernel with the ‘no_console_suspend’ parameter and try to log kernel messages using the serial console. This may provide you with some information about the reasons of the suspend (resume) failure.
https://www.kernel.org/doc/html/latest/power/apm-acpi.html
No, sorry, you cannot have both ACPI and APM enabled and running at once. Some people with broken ACPI or broken APM implementations would like to use both to get a full set of working features, but you simply cannot mix and match the two. Only one power management interface can be in control of the machine at once. Think about it..
https://www.kernel.org/doc/html/v5.4-preprc-cpu/power/apm-acpi.html
No, sorry, you cannot have both ACPI and APM enabled and running at once. Some people with broken ACPI or broken APM implementations would like to use both to get a full set of working features, but you simply cannot mix and match the two. Only one power management interface can be in control of the machine at once. Think about it..
https://bugzilla.kernel.org/show_bug.cgi?id=71051
I guess is a kernel bug, or AMD haven't released source code of suspend graphics card yet. Log attached is of AMD Catalyst driver installed and how to works fine suspend operation. Note: I don't interested use AMD Catalyst driver, because I'm using GNOME 3.10 and It's does not work with it.
https://www.kernel.org/doc/html/latest/power/suspend-and-interrupts.html
The IRQF_NO_SUSPEND Flag¶. There are interrupts that can legitimately trigger during the entire system suspend-resume cycle, including the “noirq” phases of suspending and resuming devices as well as during the time when nonboot CPUs are taken offline and brought back online.
https://forums.gentoo.org/viewtopic.php?t=152736
Sep 24, 2005 · I've compiled support for APM in because in dmesg states that my bios is old and doesn't support ACPI. then i emerged apmd and it seems to be running fine, but when i run apm -S nothing happens. Even better when i run apm -s, the system seems like its going to suspend - the screen blanks but after a second or so it comes back with:
https://www.kernel.org/doc/html/v5.4/power/drivers-testing.html
APM or ACPI? Debugging hibernation and suspend ... Unfortunately, to effectively test the support for the system-wide suspend and resume transitions in a driver, it is necessary to suspend and resume a fully functional system with this driver loaded. ... Attempt to hibernate with the driver compiled directly into the kernel in the “reboot ...
https://www.tldp.org/LDP/Mobile-Guide/html/mobile-guide-p2c1s8-apm.html
12.18.5. APM and PCMCIA. From the PCMCIA-HOWTO: "Card Services can be compiled with support for APM (Advanced Power Management) if you've configured your kernel with APM support. ... The PCMCIA modules will automatically be configured for APM if a compatible version is detected on your system. Whether or not APM is configured, you can use cardctl suspend before suspending your …
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