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Intel confirms Haswell chipset USB bug
In a Product Change Notification bulletin from Intel confirmed that the current Lynx Point 8-series and C220 chipsets for Haswell have a bug that causes USB 3.0 devices to disappear after entering S3 standby mode. The issue has been fixed in stepping C2, this updated chipset will start sampling on April 19th but won't hit the market until late July.
Affected chipsets include the Q87, Q85, H87, Z87, B85 (desktop chipsets), C222, C224, C226 (workstation/server chipsets), QM87, HM87, and HM86 (mobile chipsets).
According to the PCN the new stepping will be sampled to customers starting April 19th. Final product will be available starting July 15th. Intel also makes clear that customers must be ready to receive the new stepping by July 31st. In other words, this means by then the old stepping will be phased out and gradually replaced by the new one. Due to the minor change needed to fix the problem, Intel doesn't expect a major impact on customers. The new stepping is basically a drop in replacement.
While an official release date for Haswell hasn't been given yet, Intel is expected to introduce the new chip before the availability of the new chipset stepping. Reportedly Intel let customers sign an agreement to acknowledge the presence of the bug if they wanted to obtain Haswell APUs for launch. The bug in question causes nuisances like USB devices to disappear after entering standby. Detachable devices would have to be reconnected to be found again.
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TheDeeGee
Senior Member
Posts: 8877
Joined: 2010-08-28
Senior Member
Posts: 8877
Joined: 2010-08-28
#4613365 Posted on: 06/07/2013 01:07 PM
Remember that Windows turns off power to the USB hubs when 'not in use'. It's possible that the hub is turned off due to this, which may trigger the bug?
You can disable power management on individual hubs through the device manager. Click on 'Universal Serial Bus Controllers', click on the root hubs, and uncheck the box under 'power management' tab.
That may help you out. If it works it won't fix the problem, it will just mask the cause. It's at least worth a try, worst case scenario you will just disable power saving on those hubs which can be easily turned back on anyway.
When i leave the stick in and don't do anything it just stays visible all the time.
No clue what's happening really.
Remember that Windows turns off power to the USB hubs when 'not in use'. It's possible that the hub is turned off due to this, which may trigger the bug?
You can disable power management on individual hubs through the device manager. Click on 'Universal Serial Bus Controllers', click on the root hubs, and uncheck the box under 'power management' tab.
That may help you out. If it works it won't fix the problem, it will just mask the cause. It's at least worth a try, worst case scenario you will just disable power saving on those hubs which can be easily turned back on anyway.
When i leave the stick in and don't do anything it just stays visible all the time.
No clue what's happening really.
RavenMaster
Senior Member
Posts: 1344
Joined: 2009-08-19
Senior Member
Posts: 1344
Joined: 2009-08-19
#4613369 Posted on: 06/07/2013 01:16 PM
Lol glad I skipped haswell. Gonna go with the refined ivy-bridge E CPU for my next upgrade.
Lol glad I skipped haswell. Gonna go with the refined ivy-bridge E CPU for my next upgrade.
Darren Hodgson
Senior Member
Posts: 16601
Joined: 2004-08-18
Senior Member
Posts: 16601
Joined: 2004-08-18
#4613459 Posted on: 06/07/2013 04:41 PM
When i leave the stick in and don't do anything it just stays visible all the time.
No clue what's happening really.
Have you tried reinstalling/updating the chipset drivers?
When i leave the stick in and don't do anything it just stays visible all the time.
No clue what's happening really.
Have you tried reinstalling/updating the chipset drivers?
The Laughing Ma
Senior Member
Posts: 4670
Joined: 2008-04-12
Senior Member
Posts: 4670
Joined: 2008-04-12
#4613563 Posted on: 06/07/2013 07:49 PM
Yeah, I was gonna go for Haswell too but the more I read the more I am thinking the last gen of chips may be a better bet. Saying that I may just replace my case and see just how far I can push my I5 750 before it starts to squeal.
Lol glad I skipped haswell. Gonna go with the refined ivy-bridge E CPU for my next upgrade.
Yeah, I was gonna go for Haswell too but the more I read the more I am thinking the last gen of chips may be a better bet. Saying that I may just replace my case and see just how far I can push my I5 750 before it starts to squeal.
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Senior Member
Posts: 6640
Joined: 2010-08-27
Remember that Windows turns off power to the USB hubs when 'not in use'. It's possible that the hub is turned off due to this, which may trigger the bug?
You can disable power management on individual hubs through the device manager. Click on 'Universal Serial Bus Controllers', click on the root hubs, and uncheck the box under 'power management' tab.
That may help you out. If it works it won't fix the problem, it will just mask the cause. It's at least worth a try, worst case scenario you will just disable power saving on those hubs which can be easily turned back on anyway.