[solomatov]

Another problem which I include in UX is sleep mode. On Mac it works flawlessly. On XPS13 + Ubuntu/Fedora (I tried both) which I used, there's non zero probability that when I open laptop again, the battery is almost empty.

[cmurf]

Check the logs, is it waking, sleeping, waking, sleeping, waking, sleeping? Power management bugs are super annoying because they are tedious to dig into.

In my very obscure case, I got lucky in that suspend was working, then stopped working after a kernel update. Since it was a regression, kernel developers were more interested in tracking down the problem and I was able to find a work around: write PWRB to /proc/acpi/wakeup

The gory details are here, which I expect is so obscure it's not your problem, but shows as tedious as it is, filing bugs with a decently good bug report and willingness to do the work devs need you to do can be worth it. https://bugzilla.kernel.org/show_bug.cgi?id=185521

[solomatov]

I honestly tried my best to debug it. I installed different tools, and at some point it seemed to work, but after some time, due to some updates, it broke down. Some time after this, I just stopped using sleep mode. It was easier to turn on/off the whole machine.

XPS13 which I have is one of the most widely used linux laptops, and it a symptomatic that it doesn't work well.

[mverwijs]

Known problem. Here's the workarounds I use:

https://ubuntu-mate.community/t/xps-13-9370-wakes-from-sleep... and

https://askubuntu.com/questions/1029474/ubuntu-18-04-dell-xp...

In addition, I always use a pre-sleep script that disables bluetooth. And enables it afterwards.

Hope it helps!

[jammygit]

my xps 13 has no problem going to sleep. It just wakes up slow and drunk sometimes. My "workaround" is to put it into 'performance mode' which kills the battery.

Would those same logs help me debug my issue too?

[nwallin]

I have not had an issue with sleep mode in Linux since ~2007 or so. (In the early days, it basically didn't work at all)

I've had an XPS 13 9360 for two and a half years now, and an x230 for roughly four years before that. Before then it was a range of cheapo laptops, and while the touchpads and keyboards sucked, sleep mode was fine starting in the late aughts.

I can attest that it took a little while for sleep mode to function at all though. It was a non starter (not intended) in the mid 2000s, but the problems you describe has never been a problem I've had.

[kelnos]

At the risk of sounding uncharitable, what is the purpose of your comment? It is hard fact that sleep mode is not a consistently solved problem on Linux. Hardware variations abound, and "works for me on my hardware" isn't very helpful to people with different hardware where it's not as reliable.

[firmgently]

This isn't the right comparison to make.

As you mentioned, Linux runs on hardware made by hundreds/thousands of different uncoordinated manufacturers. Mac OS runs on a very narrow range of hardware built by the same manufacturer that makes the software. Linux is a very different project to Mac OS.

So take the best examples of Linux machines and compare those with Macbooks. So if eg. Dell XPSes or modern ThinkPad X series have solved the sleep problem consistently then it's fair to compare those with Macbooks.

Of course this doesn't help those people who have trouble with sleep on Linux and hopefully it will get better... but comparing a broad elastic OS running on a vast mess of thousands of different devices with an OS designed specifically for a small range of tightly controlled hardware isn't reasonable. It would make more sense if there were no good examples of decent Linux machines, but this isn't the case.

[kelnos]

I'm not making that comparison (I never mention macOS at all); not sure where your reading that. I'm merely pointing out that a response of "it works for me and has for 10+ years" when someone says "it doesn't work on my laptop" is entirely unhelpful.

In fact it shows that they don't at all get the point you've made that Linux runs on orders of magnitude more hardware variants than macOS does and thus it should be obvious that all hardware can't be equally well supported.

[vetinari]

It's not consistently solved on Mac either (I have sporadic problems waking up rMBP early 2015 while docked with TB2 dock).

[aembleton]

I guess it's to demonstrate that it does work on some hardware. I've not experienced any sleep issues worse than what I had on a Macbook. ie, it works 99% of the time.

[kelnos]

Right, but I think that demonstration is unnecessary (because, duh, of course it works on some hardware), and entirely unhelpful (because, duh, the person being replied to does have issues with it, and describing an unrelated experience doesn't add anything to the discussion).

[kochthesecond]

I must say that in general sleep mode has been working pretty well for me over the past 10 years in Linux. I had issues on my destop, but tracked it down to a USB headset sometimes not correctly honoring sleep states. I also had a slight problem with one of my laptops when Bluetooth was paired, Bluetooth tended to be broken after coming back from sleep. though I have had more issues my current 2017 MacBook. often when I take it out of my bag after a weekend it will be on 1% battery. it stopped happening around Autumn last year so I think they fixed it.

[suspectdoubloon]

I have an XPS13, I've changed a kernel command line parameter to change from a soft sleep to a hard sleep and battery life has greatly improved. The first comment in this reddit thread helped me out. https://www.reddit.com/r/Dell/comments/8b6eci/xp_13_9370_bat...

[tuananh]

there's probably a fix for everything but i hate doing things like this to get a proper working laptop

[robocat]

FYI for those that have an XPS15 (not XPS13)

From https://github.com/JackHack96/dell-xps-9570-ubuntu-respin/is... from https://github.com/stockmind/dell-xps-9560-ubuntu-respin

What works out-of-the-box: Sleep/wake on Intel

What does't work properly: Sleep/wake on nVidia

I recall the issue is something to do with the chip that switches between the two video outputs?