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XPS 15-9570, BIOS, sleep mode still gone? #3
February 2020. Issues are still not resolved
Sleep state still broken.i actually burnt my finger last night and the laptop led was blinking yellow/orange 4 times then white. No fans were working and when the laptop woke, the temperatures of the CPU were at 99°C!
Poor CPU clock throttling leading to unusable system. The CPU clock speed would drop to 800MHz even when temperatures were low. Mouse move occasionally become judder meaning the it is impossible to operate the system. This also lead to poor audio quality and latency issues.
Screen flicker still present, especially when connected the the thunderbolt Dock (TB97?). In addition, with two screen connected, sometimes only one would be recognized on boot. You would need to power off the monitor or even change input source (depending on which monitor failed).
Currently running the latest Windows and Dell Bios.
I have recently updated the BIOS on my 9570 and also Windows 10 to build 2004. Since then I can't put the laptop to sleep. If I try, the screen goes dark, but fans are on and keyboard is still lit. If I move mouse or touch any key, the desktop comes back on - that's right, it won't even lock or anything, no sign-in required. So far none of the offered solutions have been any help at all. Registry edits, policies changes, nothing.
Dell in not reacting to thiss issue. I had many chats with support or TechExperts but everytime it ends that this is a feature, not issue.
Here is regarding thread: https://www.dell.com/community/Latitude/5501-does-not-sleep/td-p/7580765/page/2
Stijn2
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Posted March 24th, 2020 02:00
There is an easy fix for this problem! Works with the latest bios and all older bios and it forces S3 Sleep. Been using it for a while and it works.
It disables the Dell modern standby (wich causes the problem) and sets the regular sleep function as default. (the sleep we all know and love, no fan spin, no random wakes)
Press start -> type: regedit -> press enter. Then navigate to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\CsEnabled
When you press the second to last folder (power) there is a file on the right side called CsEnable. Right click it, press modify and set the value to 0.
Tada! No more modern standby and regular sleep function has been restored! After that check the bios power settings and make sure al the “wake on ….” Functions are turned off.
Disclaimer: Be carful when working in bios and registry edit. Also, this fix is working golden for me but be carefull, after an update by dell it might revert back to old sleep someday and overheat again.