From mboxrd@z Thu Jan 1 00:00:00 1970 From: Krzysztof Halasa Subject: Re: [Bug #11382] e1000e: 2.6.27-rc1 corrupts EEPROM/NVM Date: Thu, 25 Sep 2008 18:26:27 +0200 Message-ID: References: <20080923.150722.141587696.davem@davemloft.net> <9929d2390809231512w160d221axa2923a6b293a041@mail.gmail.com> <20080923.211215.193696086.davem@davemloft.net> <21d7e9970809241722w7c3bb6a5w1af5801b7380169d@mail.gmail.com> <48DB12C9.5080104@gmail.com> Mime-Version: 1.0 Return-path: In-Reply-To: <48DB12C9.5080104-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> (Jesse Brandeburg's message of "Wed\, 24 Sep 2008 21\:25\:45 -0700") Sender: kernel-testers-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Jesse Brandeburg Cc: Dave Airlie , Jiri Kosina , David Miller , jeffrey.t.kirsher-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, david.vrabel-kQvG35nSl+M@public.gmane.org, rjw-KKrjLPT3xs0@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kernel-testers-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, chrisl-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org, Ingo Molnar , jbarnes-Y1mF5jBUw70BENJcbMCuUQ@public.gmane.org Jesse Brandeburg writes: > I'm really sorry to hear that, I wonder if the laptop has an > "emergency bios update" mode like many PCs used to through a jumper. > Dave A., let us know if you make any recovery progress. I guess it's more about the E1000's serial configuration EEPROM, the registers seem to live in BAR0 (EECD and for reading perhaps EERD). Corrupted EEPROM (and thus PCI config registers) can easily result in a dead machine. I will be writing a tool for writing 82541PI EEPROMs on a custom board soon (unless there is one available, for Linux, of course), I only have to fight non-working JTAG first :-) > I plan to try some random writes tomorrow to my BAR1 space and see if > my flash gets erased. I'm not sure it's the flash that is corrupted. Anyway booting the laptop should be quite easy (physically disabling the EEPROM on boot should do the trick), though it would require taking the machine apart. -- Krzysztof Halasa