Difference between revisions of "FAQ"

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(OpenBSD securelevel issue.)
m (I get 'Can't mmap memory using /dev/mem: Invalid argument')
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* The easiest fix is to update to latest flashrom from svn. It has less strict requirements and works on more systems without having to change the kernel.
 
* The easiest fix is to update to latest flashrom from svn. It has less strict requirements and works on more systems without having to change the kernel.
  
* (Not needed for latest flashrom from svn) [http://www.coreboot.org/pipermail/coreboot/2008-December/043708.html Please check that your kernel doesn't have CONFIG_STRICT_DEVMEM set, as it will stop flashrom from working.]
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* (Not needed for latest flashrom from svn) Please check that [http://www.coreboot.org/pipermail/coreboot/2008-December/043708.html your kernel doesn't have CONFIG_STRICT_DEVMEM set], as it will stop flashrom from working.
  
* [http://www.coreboot.org/pipermail/coreboot/2008-December/043497.html Another poster reported that CONFIG_X86_PAT will also stop flashrom from working. Please try booting with the nopat kernel parameter to temporarily disable it.]
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* Another poster reported that [http://www.coreboot.org/pipermail/coreboot/2008-December/043497.html CONFIG_X86_PAT will also stop flashrom from working]. Please try booting with the nopat kernel parameter to temporarily disable it.
  
 
== How do I use flashrom? ==
 
== How do I use flashrom? ==

Revision as of 14:36, 14 April 2012

flashrom doesn't work on my board, what can I do?

  • First of all, check if your chipset, ROM chip, and mainboard are supported (see Supported hardware, or use flashrom -L).
  • If your board has a jumper for BIOS flash protection (check the manual), disable it.
  • Should your BIOS menu have a BIOS flash protection option, disable it.
  • If you run flashrom on a Linux system with kernels >= 2.6.27 there are two issues you have to check:
    • See next question: X86_PAT and nopat
    • See next question: CONFIG_STRICT_DEVMEM
  • If you run flashrom on OpenBSD, you might need to obtain raw access permission by setting securelevel=-1 in /etc/rc.securelevel and rebooting, or rebooting into single user mode.
  • See this page for instructions on how to test flashrom support properly (this may be risky, make sure you have a working backup flash chip).

I get 'Can't mmap memory using /dev/mem: Invalid argument'

  • The easiest fix is to update to latest flashrom from svn. It has less strict requirements and works on more systems without having to change the kernel.

How do I use flashrom?

Please see the flashrom(8) manpage.

Is there a flashrom Live CD?

See Flashrom/Live CD.