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I helped fix sleep-wake hangs on Linux with AMD GPUs

nyanpasu64.gitlab.io

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Re: I helped fix sleep-wake hangs on Linux with AMD GPUs

#101

Post by lorenzbrun »

Author of memreserver (one of the mentioned userspace workarounds) here. I've debugged this a few years back, only public comment I can quickly find is [1]. I also remember some mailing list discussions, but it basically came down to the isuse that Linux didn't have staggered suspend hooks that reliably ran before disks and parts of the memory subsystem were frozen. Apparently this is now possible. Sadly the Freedesktop Gitlab doesn't seem indexable so this knowledge seems to have gotten lost.

[1] https://gitlab.freedesktop.org/drm/amd/-/issues/2125#note_17...

Re: I helped fix sleep-wake hangs on Linux with AMD GPUs

#102

Post by kristianp »

kiwijamo wrote: post #82
Daunk wrote: post #24

For all the years I've been using Linux, I've always had some kind of sleep issues. I've used Intel, AMD, ATI, and NVIDIA hardware across countless distros and setups, yet nothing seems to make a difference, there's always something that doesn’t work properly with sleep or hibernation. Honestly, it's one of the main issues I wish the Linux community would take a closer look at and finally fix!

Interestingly sleep/wake is something I've found to work almost always just fine out of the box in Linux, including on machines Windows has sleeping issues! It used to be quite bad but things has improved heaps over the last 10 or so years -- however I've also stuck with Lenovo laptops which does generally seem to have better support in Linux.

I agree, I have a Thinkpad with Intel processor + nvidia GPU purchased in 2023 and I have not had sleep issues. Ubuntu 22.04.

The nearest thing to a sleep issue is that the screen is visible for a fraction of a second on some wakeups before the lock screen covers it. A bit of a privacy issue.

Good to see that AMD might be getting better support, in part because of its growing popularity.

Re: I helped fix sleep-wake hangs on Linux with AMD GPUs

#103

Post by ycui1986 »

Apofis wrote: post #23
sabujp wrote: post #16

This is amazing work! If folks have ever wondered why suspend is so difficult to get working on linux and why debugging it is equally difficult, this is a single datapoint with lots of information about all the things that can go wrong. Even now I have a thinkpad P1G4 where the fans won't turn off automatically unless I turn them off before going into suspend. Recently I also started having crackling issues with my b…

Remarkable that it's 2025 and laptop sleep/suspend still doesn't work right on linux. I think the first time I encountered this was probably 15 years ago now?

they don’t work on Windows either. Multiple of my laptops crash when wake up 30% of the times.

Re: I helped fix sleep-wake hangs on Linux with AMD GPUs

#104

Post by whizzter »

dhon_ wrote: post #86
OvbiousError wrote: post #62

Earlier quoted context omitted.

My colleague showed me his windows machine recently. The rubber on the back around the fans has melted from the times he forgot to shut it down and sleep didn't trigger when he packed it away in his backpack.

Linus tech tips on YouTube did a video about a windows bug where sleeping while charging would allow the laptop to wake up to check for updates etc but often caused this issue of turning on in a bag

It wouldn't happen that this feature was released around early/mid 2020? Windows sleep used to be semi-reliable but one it's been shit for a couple of years.

(Any link to the video/docs for turning it off?)

Re: I helped fix sleep-wake hangs on Linux with AMD GPUs

#105

Post by stock_toaster »

mindcrime wrote: post #97
xondono wrote: post #36

Earlier quoted context omitted.

Sleep & suspend doesn’t work on Windows either. Power control is the kind of stuff that benefits from very tight integration, and PCs just don’t have that. Firmware is seen by most vendors as a pure cost to minimize, so you get a fragmented market full of subcontractors delivering the bare minimum that is considered “working”. Manufacturers also know most people aren’t going to use a big part of the functions they’re…

> Sleep & suspend doesn’t work on Windows either. Or Macintosh. My $DAYJOB Macbook sleeps properly about about 2 out of 10 times, at best. Most of the time it fails to sleep and by the next morning when I open it up, the battery is dead. :-( For comparison, my System76 laptop running PopOS! sleeps perfectly, every time with no issues. shrug

> Or Macintosh. My $DAYJOB Powerbook...

You use a 20+ year old[1] PowerPC laptop for your dayjob?

Talk about hardware longevity!

[1]: Powerbooks were last made in 2006 I think?

Re: I helped fix sleep-wake hangs on Linux with AMD GPUs

#106

Post by badsectoracula »

I wonder if this will help a similar problem i have with my AMD GPU: very often when i wake/resume the PC, the output is almost frozen. "Almost" because it actually isn't frozen, if there is any output/animation/etc going on it plays fine, but once i try to move the mouse it freezes and everything updates at a single frame per couple of seconds - sometimes freezing completely. I can usually Ctrl+Alt+Fn to another virtual desktop in text mode and, if that is possible (i.e. the computer hasn't completely frozen, though sometimes it takes about a minute to switch), i can Ctrl+Alt+Fn back and everything works fine. Dmesg has a ton of spam messages from amdgpu after that.

AFAICT (from the behavior) something isn't properly saved/restored and communicating with the GPU (the mouse cursor is a hardware cursor thus needs to send commands to the GPU to update its position) causes some sort of issue. Switching to another virtual terminal that is running in text mode probably forces the driver to reset its graphics state. Of course that is just my assumption based on what i see going on.

Weirdly enough this only happens after i replaced my RX 5700 XT with a RX 7900 XTX so it might be something GPU (or GPU arch) specific.

I've been considering plugging my laptop and see if there is something i can figure out (GPU aside the PC is usable, but i guess if this a kernel side thing i'd need a second computer connected to it to debug it), but as this isn't something i've tried before (though i know someone who has and said it isn't anything special) my annoyance still hasn't gone over the "i need to get to the bottom of this" threshold :-P.

It'd be nice if 6.14 fixes the issue, though i am not sure as i rarely have more than 1/3rd of the system RAM (32GB) in use and VRAM (24GB) barely goes above 1-2GB of use outside games. But this post might be helpful in diagnosing the issue next time it happens :-).

Re: I helped fix sleep-wake hangs on Linux with AMD GPUs

#107

Post by tiagod »

sroussey wrote: post #90
kiwijamo wrote: post #78

Earlier quoted context omitted.

Even Apple struggled to get it working perfectly in my experience across several models in the PPC/x86 era. Yes they are better(-ish) but when I had Apple laptops I'd still see weird sleep/wake issues in around 1 in every ~50 sleep/wake cycles. I also had one Apple laptop which had its battery going from 100% to 0% overnight during sleep requiring a cold start in the morning on a regular basis despite it being put to…

It’s much better on ARM. And their external monitor support is so much faster and reliable now. Having control over all their hardware has made a noticeable improvement.

This is not my experience. My M1 Pro MacBook has very strange issues with sound over HDMI. I usually need to reboot it when I connect it to my TV or media won't play if the sound is output over HDMI.

Re: I helped fix sleep-wake hangs on Linux with AMD GPUs

#108

Post by jml78 »

xondono wrote: post #36
Apofis wrote: post #23

Earlier quoted context omitted.

Remarkable that it's 2025 and laptop sleep/suspend still doesn't work right on linux. I think the first time I encountered this was probably 15 years ago now?

Sleep & suspend doesn’t work on Windows either. Power control is the kind of stuff that benefits from very tight integration, and PCs just don’t have that. Firmware is seen by most vendors as a pure cost to minimize, so you get a fragmented market full of subcontractors delivering the bare minimum that is considered “working”. Manufacturers also know most people aren’t going to use a big part of the functions they’re…

Are there issues in Windows? Sure but if you give me 100 laptops, 80% will do this right without any issue. Maybe 30% of those laptops will work right on any Linux distro without major fucking around with bullshit trying to make it work. Yes those numbers are made up but I have been running versions of Linux since Slackware in the 90s. I still have a desktop with an amd cpu and nvidia gpu that I can’t get to sleep/suspend right. Works fine when dual boated in windows. I just gave up and manually do shit now when using Linux

Re: I helped fix sleep-wake hangs on Linux with AMD GPUs

#109

Post by 0x38B »

itsn0tm3 wrote: post #76
nikanj wrote: post #70

Earlier quoted context omitted.

Only on Linux though, on Windows it’s O(n2) and on Macos it’s O(log n)

Well only as long as you don‘t hackintosh. That stuff used to be a horror sometimes!

Remembering the hours I spent going through KEXTs and bootloader config in ill-fated attempts to set up a Hackintosh fills me now with a kind of horror. Worst of all were the ACPI tables - SSDT and the like.

In contrast to that, running MacOS in a VM is heaven. Figuring out how to pass my iPhone through to Xcode took as long as the initial setup.

Re: I helped fix sleep-wake hangs on Linux with AMD GPUs

#110

Post by saint_yossarian »

Voultapher wrote: post #18

Since a couple Linux versions something around 6.10 IIRC I've had it where my Nvidia system wakes into a black screen, but with a cursor and alt shells work, specifically KDE Plasma seems bugged here, but they say it's a kernel issue, or at least there are dozens of separate issues open about this kind of bug and it's rather annoying that I can't put my machine to sleep. If anyone has ideas what could fix this I'd re…

I had a similar issue recently and at some point realized it was because systemd started freezing all processes before suspend, and didn't always succeed (either with the freeze, or with the unfreezing after resume).

Check your logs if you have a message "Freezing user space processes failed". You can disable this behaviour with the instructions at https://github.com/systemd/systemd/issues/33626#issuecomment...

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