3 ms·

This is a big one — when you close the lid on your laptop, the laptop stays on. When you open the lid again, the battery will be drained, because it stayed on

by toomim 4y ago

This is a big one — when you close the lid on your laptop, the laptop stays on. When you open the lid again, the battery will be drained, because it stayed on the entire time.

weberer 4y ago
Unfortunately, that's also a problem with like 90% of new computers out there.
- jdwithit 4y ago
  This has been a problem as long as laptops have existed. I had a Dell in like 2006 that I would close and throw in my backpack at the end of the day. When I got home there was a 50:50 chance it would be about 5000 degrees with the fans blasting because it never actually went to sleep. The fact that this still routinely happens 15 years later despite the insane progress of technology is kind of hilarious.
  - Kuinox 4y ago
    This is a widespread recent problem due to Intel pushing for S2 sleep.
- m_eiman 4y ago
  The remaining 10% are the mac, I suppose? It's one of the better things about macs, and has been working mostly flawlessly for at least 15 years, strange that the other platforms still struggle with it.
  - weberer 4y ago
    There are a few non-Mac vendors that still support S3 sleep mode. I think Thinkpads still work. The problem is that it requires vendors to support it in the BIOS. Windows no longer supports S3 sleep mode, so vendors aren't willing to add that feature just for Linux users. Previous discussion: https://news.ycombinator.com/item?id=33846437 https://news.ycombinator.com/item?id=33846437
  - happymellon 4y ago
    My 2019 Intel Mac Pro is really flakey about actually going to sleep when I close the lid. It seems to require me to reset the PRAM occationally to get it to work again. I'm glad they moved to their own chips because these Intel Macs are the worst hardware I have ever owned. My Thinkpad works fine under Linux, I didnt need to do anything to get great battery life and perfect sleep.
  - sofixa 4y ago
    For what it's worth, my MBP is also a coin toss if it manages to get to sleep or not. Oftentimes even if i explicitly click Apple -> Sleep it just flashes and stays awake.
dottedmag 4y ago
Display controller stays on. It's battery-hungry. This should change, now that DCP driver is available. s2idle will be pretty resource-light once all peripherals can be put into sleep. CPU by itself is not consuming that much power when idle.
fulafel 4y ago
Depends on how low your battery was. Here's a quote from their november update: "CPU frequency scaling, device runtime PM (for select devices), hardware auto-PM… even prior to this release, users could already get 10+ hours of idle runtime. With DCP and proper display DPMS, that now goes as high as 30+ hours (powered on, screen off)!" [...] "While s2idle does work, it’s in its infancy and we haven’t debugged all driver issues yet. Here’s what works: NVMe is shutdown WiFi goes into S3 mode Display (DCP) goes into DPMS (backlight & screen fully off) DARTs power gate & restore state on resume CPUs stay in shallow idle Some misc devices (i2c/spi/etc) power off Wakeup via power button or lid open " So they report 30 hours of battery life with display off (not sure if it was in s2idle or just normal screen off operation). So if you close the lid overnight, it should eat <30% of the battery.

by toomim 4y ago

This is a big one — when you close the lid on your laptop, the laptop stays on. When you open the lid again, the battery will be drained, because it stayed on the entire time.

weberer 4y ago

Unfortunately, that's also a problem with like 90% of new computers out there.

jdwithit 4y ago
This has been a problem as long as laptops have existed. I had a Dell in like 2006 that I would close and throw in my backpack at the end of the day. When I got home there was a 50:50 chance it would be about 5000 degrees with the fans blasting because it never actually went to sleep. The fact that this still routinely happens 15 years later despite the insane progress of technology is kind of hilarious.
- Kuinox 4y ago
  This is a widespread recent problem due to Intel pushing for S2 sleep.
m_eiman 4y ago
The remaining 10% are the mac, I suppose? It's one of the better things about macs, and has been working mostly flawlessly for at least 15 years, strange that the other platforms still struggle with it.
- weberer 4y ago
  There are a few non-Mac vendors that still support S3 sleep mode. I think Thinkpads still work. The problem is that it requires vendors to support it in the BIOS. Windows no longer supports S3 sleep mode, so vendors aren't willing to add that feature just for Linux users. Previous discussion: https://news.ycombinator.com/item?id=33846437 https://news.ycombinator.com/item?id=33846437
- happymellon 4y ago
  My 2019 Intel Mac Pro is really flakey about actually going to sleep when I close the lid. It seems to require me to reset the PRAM occationally to get it to work again. I'm glad they moved to their own chips because these Intel Macs are the worst hardware I have ever owned. My Thinkpad works fine under Linux, I didnt need to do anything to get great battery life and perfect sleep.
- sofixa 4y ago
  For what it's worth, my MBP is also a coin toss if it manages to get to sleep or not. Oftentimes even if i explicitly click Apple -> Sleep it just flashes and stays awake.

dottedmag 4y ago

Display controller stays on. It's battery-hungry. This should change, now that DCP driver is available. s2idle will be pretty resource-light once all peripherals can be put into sleep. CPU by itself is not consuming that much power when idle.

fulafel 4y ago

Depends on how low your battery was. Here's a quote from their november update: "CPU frequency scaling, device runtime PM (for select devices), hardware auto-PM… even prior to this release, users could already get 10+ hours of idle runtime. With DCP and proper display DPMS, that now goes as high as 30+ hours (powered on, screen off)!" [...] "While s2idle does work, it’s in its infancy and we haven’t debugged all driver issues yet. Here’s what works: NVMe is shutdown WiFi goes into S3 mode Display (DCP) goes into DPMS (backlight & screen fully off) DARTs power gate & restore state on resume CPUs stay in shallow idle Some misc devices (i2c/spi/etc) power off Wakeup via power button or lid open " So they report 30 hours of battery life with display off (not sure if it was in s2idle or just normal screen off operation). So if you close the lid overnight, it should eat <30% of the battery.