Do not leave XPS laptop in any sleep/hibernate/standby mode when placed in a bag

Clickbaity title. It says

> Under no circumstances should you leave a laptop powered on and in any sleep/hibernate/standby mode when placed in a bag, backpack, or in an overhead bin. The PC will overheat as a result of that action. Any resulting damage will not be covered by the Dell warranty.

Now how a hibernated laptop could overheat..

Clickbait.

What they actually say: "Under no circumstances should you leave a laptop powered on and in any sleep/hibernate/standby mode when placed in a bag, backpack, or in an overhead bin. The PC will overheat as a result of that action. Any resulting damage will not be covered by the Dell warranty."

Fair enough. A laptop that overheats because it's been left in an enclosed space whilst not off is not damage caused by a fault of the device.

I've had hibernated laptops wake up for whatever reasons in bags before. They get super-hot and shut down.

Come to think of it, they were Dells. Perhaps some switch is not properly debounced or something.

The issue is that Windows doesn't go into S3 sleep when you close the lid; it goes into a weird not-really-asleep state for... some reason that I don't agree with[0]. I guess that state is "hot" enough that you could damage the laptop by putting it in a bag while in that state.

Fortunately I've been running Linux on my XPS 13, which I have put into a bag hundreds of times (maybe even over a thousand) while suspended. Linux's suspend does actually use the "cold" S3 suspend state, so this is safe.

[0] It's called "Modern Standby" (https://docs.microsoft.com/en-us/windows-hardware/design/dev...), which... honestly sounds really stupid to me. "Modern Standby" presumably drains the battery orders of magnitude faster than a normal S3 standby. I can't imagine ever wanting this behavior. I'm entirely fine with my laptop taking ~10 seconds to wake up and reconnect to whatever network I'm near.

Not really in practice though - to rephrase, you can only put it in a bag if it's shut down - how many people do that frequently other than to reboot for some reason? How many of those do it every time they put it in a bag? As if on your commute to work for example you're going to power on when you get on the train, shut down again when you get off, power on again when you get into the office, off again when you leave, ... (and if the job involves lots of client meetings, or presentations in another building..!)