ron minnich [mailto:rminn...@gmail.com] wrote:
]Thanks scott!
]
]So, what does an OS do to disable USB in the operating system? We have
]seen Linux do it, we're not quite sure just what
]place it gets done.
]
]ron
If I understand your question, I am not sure I know the answer. If you
boot linux
The guys found it, bit in southbridge to enable SMI interrupts, they
turned it off and are now seeing a 40 hz. interrupt. It never ends.
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This is really interesting information, thanks.
This embedded USB stack problem actually impacts HPC applications.
This type of periodic interference can cause big troubles when you
have lots of nodes.
Look for the case of the missing supercomputer performance for a
classic paper. In that case,
ron minnich [mailto:rminn...@gmail.com] wrote:
]This is really interesting information, thanks.
]
]This embedded USB stack problem actually impacts HPC applications.
]This type of periodic interference can cause big troubles when you
]have lots of nodes.
]
]Look for the case of the missing
Thanks scott!
So, what does an OS do to disable USB in the operating system? We have
seen Linux do it, we're not quite sure just what
place it gets done.
ron
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Hi Ron,
Am 26.08.2014 00:22 schrieb ron minnich:
disabling the usb stack is the goal in this case.
AFAIK it's called USB keyboard support, USB legacy support or
something similar in most BIOSes. This internally maps a USB keyboard to
a virtual PS/2 keyboard and sometimes has quite a few issues.
Hello,
Just checked some binaries - PEI USB driver is loading anyway, no
checking for any setup option, so I guess it will be very hard even
with the unpacking UEFI image and removing these drivers. Also in most
UEFI systems big part of USB driver working in SMM mode, so it will be
hard to patch
A friend asks me how to disable the usb stack in his bios. I have no
clue, anyone?
ron
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On 25.08.2014 23:28, ron minnich wrote:
A friend asks me how to disable the usb stack in his bios. I have no
clue, anyone?
Doesn't sound like end goal. But I'd go through setup menu to see if
something fits his *end* goal (disabling usb stack sounds like means to
goal, not the goal itself).
disabling the usb stack is the goal in this case.
ron
On Mon, Aug 25, 2014 at 2:32 PM, Vladimir 'φ-coder/phcoder' Serbinenko
phco...@gmail.com wrote:
On 25.08.2014 23:28, ron minnich wrote:
A friend asks me how to disable the usb stack in his bios. I have no
clue, anyone?
Doesn't sound like
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