On 28.03.2017 01:39, Denis 'GNUtoo' Carikli wrote: > On Mon, 27 Mar 2017 16:14:53 +0200 > Zoran Stojsavljevic <[email protected]> wrote: > >> [user@localhost projects]$ cat dmesg.txt | grep 00:19.0 >> [ 0.151652] pci 0000:00:19.0: *[8086:294c*] type 00 class 0x020000 >> [ 0.151694] pci 0000:00:19.0: reg 0x10: [mem 0xe1600000-0xe161ffff] >> [ 0.151707] pci 0000:00:19.0: reg 0x14: [mem 0xe1624000-0xe1624fff] >> [ 0.151721] pci 0000:00:19.0: reg 0x18: [io 0x3000-0x301f] >> [ 0.151802] pci 0000:00:19.0: PME# supported from D0 D3hot D3cold >> [ 1.489719] e1000e 0000:00:19.0: Interrupt Throttling Rate >> (ints/sec) set to dynamic conservative mode >> [ 1.611526] e1000e 0000:00:19.0: The NVM Checksum Is Not Valid >> *[ 1.635873] e1000e: probe of 0000:00:19.0 failed with error -5* > The Lenovo Thinkpad X200 uses a GM45 chipset. This chipset supports > different ways of booting: > (1) Having a boot fimrware occupy all the flash chip, if you do that the > Ethernet will not work, according to the datasheet. > (2) Having a boot firmware with the management engine firmware. > (3) Having a boot firmware without the management engine firmware. > > It is strongly advised to do (3) and follow the corresponding coreboot > documentation.
Strongly advised by who? In which scenario? Under which assumptions? > To get a working Ethernet with (3) you need to set a > valid mac address: > In the installation documentation, you are expected to use ich9gen, > however if you use it this way: >> $ ./ich9gen > It will not produce a valid MAC address. You must instead do something > like that, and replace <A-VALID-MAC-ADDRESS> by a valid MAC address: >> $ ./ich9gen --macaddress <A-VALID-MAC-ADDRESS> > To find such MAC address, you have several options: > - Look if it can be found on a sticker on the bottom of your laptop. > - Reflash the original flash content and get it with: >> $ ifconfig -a > or: >> ip link Pew, thanks for reminding me, that we have this in our wiki. > > == Side note == > According to the wikipedia article on MAC Address[1], the 3 bytes on > the left correspond to a vendor/organisation. > So I got a valid MAC address with the methods mentioned above, and only > kept the 3 bytes on the left, and tested that MAC address: >> 00:1f:16:00:00:00 > And it worked on my Lenovo Thinkpad X200. > To use that MAC address, just use: >> $ ./ich9gen --macaddress > > It might be possible that all addresses between 00:1f:16:00:00:00 and > 00:1f:16:FF:FF:FF work, but I didn't test that. If you read that article, you might learn that any but the broadcast ad- dress should work, as long as it's unique on the local network segment. Also, that your address claims to be globally unique. Which might not be the best idea. Nico > > References: > ----------- > [1]https://en.wikipedia.org/wiki/MAC_address#Address_details > > Denis. -- coreboot mailing list: [email protected] https://www.coreboot.org/mailman/listinfo/coreboot
