Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition | |||
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Solution Type Technical Instruction Sure Solution 1006072.1 : Stop-A doesn't send a hard break on systems with USB keyboard.
PreviouslyPublishedAs 208468 Description USB keyboards cannot get the ok prompt if the OS is experiencing a hard hang, because of the nature of USB interrupts. So in order to get to the ok prompt, another method is needed to generate a hard interrupt. Steps to Follow This document currently applies to Sun Fire[TM] B1000, Sun Fire[TM] B2000, Sun Fire[TM] 280R, Sun Fire[TM] V480 and Sun Fire[TM] V880 platforms, and it will also apply to all future platforms that use the todds1287 chip to drive the power button/switch on the front of the machine. These platforms introduce USB functionality on graphical desktops, which disables the ability to generate a hard break by unplugging/plugging the keyboard cable. These platforms now support a Power Button Abort condition that allow a system to enter the debugger or monitor (by sending three interrupts at level 15). The interrupts are triggered by pressing the Power Switch on the front of the machine 3 times within 1.5 seconds. On the third press, a call is made to the routine abort_sequence_enter() to enter the debugger/monitor (OBP). On systems fitted with a key switch, the key setting must be in either the On or Diagnostic for the Power Button Abort to function. If the key switch is in the Secure position, then the power button abort is ignored. The functionality is enabled by default in the todds1287 driver and is available in the following Solaris[TM] Releases Solaris[TM] 10 build 17 Solaris[TM] 9 Update 3 Solaris[TM] 8 patch 109888-17 NOTE: Since debug_enter() uses a softint to abort the machine, break points may be required in debug_enter() within kadb for hung machines. For example: boot kadb -d debug_enter:b :c NOTE 2: In addition, KEYBOARD_ABORT must be set to enable in /etc/default/kbd in order for this method to work. This is the default for Solaris, disable is the default for Trusted Solaris. Product Sun Fire V880 Server Sun Fire V480 Server Sun Fire 280R Server Sun Blade 2000 Workstation Sun Blade 1000 Workstation Netra 20 Server Internal Comments There are seven (7) driver tunables which can be set in /etc/system to change the behavior of the power button, they are listed as follows : set todds1287:power_button_abort_interval = 150000000 This specifies the interval for the break set todds1287:power_button_abort_presses = 3 Required number of power button pushes to set todds1287:power_button_abort_enable = 0 Disables the power break sequence set todds1287:power_button_enable = 0 Disables the ability to power down the system The last 3 tunables should be left as default, set todds1287:ds1287_interrupt_priority = 15 9 Sets the interrupt level of the powerbutton set todds1287:ds1287_softint_priority = 2 This changes the softint level set todds1287:power_button_debounce = 5000000 This increases the Reference Documents BugID 4692023 power button can be enhanced to provide hard break PSARC 2002/416
hang, break, USB, todds1287, power button, L1-A, hung, crash dump, core Previously Published As 51261 Change History Date: 2009-11-20 User name: Dencho Kojucharov Action: Updated Comments: Currency check, audited by Dencho Kojucharov, Entry-Level SPARC Content Team Date: 2006-01-12 User Name: 115669 Action: Add Comment Comment: What exactly is the definition of a "hard" break? Can one generate a "soft" break? It also talks about Solaris 10 build 17 - is this relevant given it was never relased to customer? Would "Solaris 10" suffice? Equally, I would expect it to be Solaris 9 with a certain patch level rather than Solaris 9 U3. Is this correct? Or can Solaris 9 FCS not be patched to enable it to work? There is also no punctuation in the list of minimum OS's - it is a continuous stream of words and letters :-) NOTE 2 mentions that the KEYBOARD_ABORT must be set to enable in /etc/default/kbd. What about the setting "alternate"? Is this ignored? Attachments This solution has no attachment |
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