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公开(公告)号：US11163885B2
公开(公告)日：2021-11-02
申请号：US16603274
申请日：2017-04-21
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Richard A Bramley
Abstract: A computer system is monitored by firmware for a non-conforming state. Upon detecting the non-conforming state, firmware of the computer system outputs a keyboard code that causes an operating system to enter a predetermined state, such as a lock screen or other quiescent display state. A human-perceptible message is displayed at a display device after outputting the keyboard code.
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公开(公告)号：US11868276B2
公开(公告)日：2024-01-09
申请号：US17830730
申请日：2022-06-02
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Richard A Bramley , Baraneedharan Anbazhagan , Valiuddin Ali
CPC classification number: G06F12/1416 , G06F12/0246 , G06F2212/1052 , G06F2212/7207
Abstract: An example non-transitory computer readable storage medium comprising instructions that when executed cause a processor of a computing device to: in response to a trigger of a system management mode (SMM), verify all processor threads have been pulled into the SMM; in response to a successful verification, enable write access to a non-volatile memory of the computing device via two registers, where the writing access is disabled upon booting of the computing device; and upon exiting the SMM, disable the write access via the two registers.
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公开(公告)号：US20210103660A1
公开(公告)日：2021-04-08
申请号：US16603274
申请日：2017-04-21
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Richard A Bramley
Abstract: A computer system is monitored by firmware for a non-conforming state. Upon detecting the non-conforming state, firmware of the computer system outputs a keyboard code that causes an operating system to enter a predetermined state, such as a lock screen or other quiescent display state. A human-perceptible message is displayed at a display device after outputting the keyboard code.
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