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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Senior Member
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Far as i concerned it for laptops, Desktops are not ment to be lower power devices laptops are. Power saving features something desktops useless imo, Stoves,Microwaves, Washers,dryers AC, Etc and alot of othe appliances use way more power. and power a desktop draws a month is gona nothing close compared to the other stuff.
Huh? I did say that this is more of an issue for laptops, not desktop. What are you saying? lol
deltatux
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Posts: 9797
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An SSD doesn't save me from my motherboard doing a check of every port of every controller one by one. I have about 9001 controllers on this thing.
Gah, I wanted to buy a Haswell system as soon as the parts were available.
Both of my rigs my main on the Z68 and my Z77 don't take but about 10 seconds to go through its post dance the Z77 takes even less I have to start spamming delete as I'm pressing the power button to go into the BIOS. Have tried disabling everything your not using on your board?
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A new stepping to resolve the issue is their admission that it breaks the chip. It breaks the chip so much they have to fix it...with a new stepping. If it didn't break the chip, they would just sell the chip.
Rocket science.
Breaks the chip? If only you knew what other IC companies sell. It is definitely a mishap but not a deal breaker. Most of the time the decision boils down to OEM and market pressure (Time to market being a priority), it is better to have a chip with documented and avoidable problems, than to waste fab time running them under capacity.
Plus consumer market standards allow chipmakers to sell chips with these problems, otherwise half the products people want would take years more to reach the market. For example like for automotive MCUs which have 5 year long product cycle (sometimes longer) with strict guidelines for mission critical applications.
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Not that this particular bug would bother me personally but I find it interesting that so few people use sleep mode on their desktops.
I don't turn my desktop off, ever.
The power draw in sleep mode is less than my watt-meter can reliably measure and it sleeps/wakes in a few seconds rather than having to go through the whole minute-long boot process.
I reboot something like once or twice a month, with the monthly Windows updates and if some other software requires it to update correctly.
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Joined: 2009-10-12
A new stepping to resolve the issue is their admission that it breaks the chip. It breaks the chip so much they have to fix it...with a new stepping. If it didn't break the chip, they would just sell the chip.
Rocket science.