Let me add my name to the long list of folks having problems with the "sleep then spurious reboot" syndrome. I am running Vista without SP1 and nothing else special on my new Inspiron 1525 laptop. Everything was fine until a Windows update 2 weeks ago, after which the problem appeared. I contacted Dell technical support and they updated my video driver (didn't help). I did the rather lengthy (2+ hrs) Dell diagnostics and found only one problem...a fan error.
I did a 48 hr Windows system restore and the problem disappeared until the next Win update, when it reared its ugly head. I read about the WLAN 1395 workaround on this forum, gave it a try and the problem with the reboot disappeared and low and behold the fan error also disappeared when running diagnostics. Dell technical support called back yesterday and suggested the WLAN 1395 workaround. I thanked them very much, but suggested they look into a more permanent solution than this workaround.
Thanks to all of you on this thread,I have managed to sort this same problem out by changing the power management of the 1395.
My laptop is 8 days old...!
Any ideas why this only happened after sp1?
I too seemed to have solved the problem by disabling the Dell WLAN power setting.
I am at the end of my rope with Dell. This is the third laptop in a row that has had some sort of fixable, yet nearly critical issue with power savings and management settings. The first two were Inspiron 1520's. The 1500 line has not been up to Dell's usual quality and reliability. I have been very disappointed.
Pointing the finger at MS is not an excuse. If the issue is known, and from the number posting here it clearly is, Dell should have a real solution by now.
My thanks to a great user community to figure out a workaround.
My message to Dell: Shape up, or you're going to lose customers.
What a relief to find this community.
I have the same problem with the shutdown doing a restart on my Inspiron 1525 Vista SP1 Bios A11 (3 weeks old). As far as I recall I first noticed this after the SP1 update. I am using Dell recommended power settings.
I have found that it shuts down and hibernates properly if I manually turn off the wireless using the switch at the right hand side of the computer so I strongly suspect for me it may be an issue with the wireless.
I have two listed network adapters: 1395 WLAN Mini card and the Marvell Yukon 88E8040 Fast Ethernet controller. At present the power management options for both of these ALLOW the computer to turn them off to save power off this device but DISALLOW them to wake the computer. The driver for the Marvell Fast Ethernet controller was listed by Windows as a previous reason for slow shutdown. The latest driver (10.61.2.3) on the Marvell website http://www.marvell.com/drivers/ is very recent 20/05/2008 so I updated that (it seems not to affect the shutdown/reboot issue however). Should I change the power management options on both of these to DISALLOW power saving?
Dell: The laptop is great but this bug has been a real pain for me.
I tried doing each individually. I also went through each of the other approaches listed in this thread individually. The only one that worked for me was disallowing windows to turn off the wireless card.
Others on here have claimed other fixes have worked. My suspicion is that either there is a more fundamental problem here, or that the users that changed the bios to fix the problem never posted back when the problem returned. For an hour or so, I thought replacing the BIOS with an older version worked, but it did not.
My symptoms were exactly as everyone else described. Sleeping would work twice after I changed something, and on the third try would cause a reboot.
Out of curiosity, I checked to see if HP users were having the same problem. They were, but HP quickly released a fix within days of SP1. As far as I can tell, every Inspiron 1525 with the standard wireless card has this issue. What is Dell waiting for?
Wow amazing! This appears to have solved the problem for me.
No messing around with BIOS etc. I just changed the power management settings on the Dell Wireless 1395 WLAN card to DISALLOW the computer to turn it off to save power (the wake option was disallowed by default). I have tried sleep/hibernate/shutdown and restart and it all seems to work fine. Hopefully this will be the end of it.
Thanks guys so much. Now I can go into sleep mode properly
For me the fix worked perfectly for the shutdown/hibernate/sleep rebooting problem. I didn't experience random sleeping. Did your problems only start after SP1?
Agreed. Can you provide a link to where the problem was blamed on MS? I am assuming you are intimating that Dell is blaming MS for the problem.
This issue has been escalated for investigation to the proper engineering groups at Dell.