It is indeed very tricky process which can getanyone into trouble. While I successfully did install John Lewis's SeaBios (20140813) on my Acer CM, and installed ubuntu. I am discouraged to upgrade it maully to solve problem with "suspend" and "shutdown".
I was wondering if future updates (or new version ) of SeaBios could be included in ubuntu's own software package just like other applications. I am not sure. This provision could greatly reduce the risk of bricking the LT when comes to update or upgrade the bios. ------------------------------------------------------------------------------------------------------------------------------------ On Saturday, January 31, 2015 at 7:27:20 AM UTC-8, Josh Glazer wrote: > > Unbrick an Acer C720 and install Debian Wheezy > > I bricked my Acer C720-2420 playing with bios update. Opps. Here’s how I > unbricked it. I used John Lewis’ excellent website > <https://johnlewis.ie/> (thanks John, you are the man!) as a general > outline. These instructions outline the concept: > http://johnlewis.ie/unbricking-a-samsung-series-5-550-chromebook/ > > FYI only, info on the bios chip > > > http://www.nexflash.com/NR/rdonlyres/591A37FF-007C-4E99-956C-F7EE4A6D9A8F/0/W25Q64BV.pdf > > Buy this equipment: > > Bus Pirate v3.3: http://dangerousprototypes.com/docs/Bus_Pirate from this > site: > > > http://www.seeedstudio.com/depot/bus-pirate-v3-assembled-p-609.html?cPath=61_68 > > CPT-063 Test Clip SOIC8 Pomona 5250 > > > http://www.amazon.com/gp/product/B00HHH65T4/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1 > > Female to Female Solderless Flexible Breadboard Jumper Cable Wire > > > http://www.amazon.com/Female-Solderless-Flexible-Breadboard-Jumper/dp/B00D7SCMZ8/ref=pd_sim_e_1?ie=UTF8&refRID=126G793PR1R05W7T74DD > > Un-brick > > DISCONNECT THE CHROMEBOOK BATTERY and the AC POWER SUPPLY! > > Connect the female ends of the jumper cables to the Bus Pirate (BP) and > the SOIC8 clip such that the SOIC8 connects to the bios chip ports (ports?) > as shown in the text below. I used the Bus Pirate (BP) pin-out on this > website: > http://dangerousprototypes.com/forum/viewtopic.php?f=40&t=5187&view=unread#p50375 > > > I reviewed the manual for both the W25Q64FV and the W25Q32B to confirm > that both chips have the same pin-out. > > On BP .......... On SOIC Clip => W25Q32B chip > > CS <=======> CS (1) > > GND <=======> GND (4) > > CLK <=======> CLK (6) > > 3V3 <=======> VCC (8) > > MOSI <=======> DI (IO0) > > MISO <=======> DO (IO1) > > Keep in mind that 2 of the wires connected to the bios chip won’t be used > and 4 of the pins on the BP won’t be used. Triple-check the pinouts or you > may permanently fry the chip. When you are done it should look like this: > > > > To run the Bus Pirate (BP) I used a MacBook Air with Debian 3.6 installed > on Parallels. I used Debian only in command line mode (no GUI) and > followed the instructions below to set up the BP on the Mac: > > http://hardcoreforensics.com/research-hardware/tool-setup/buspirate-v3/ > > I did not use ZTerm but I did use the instructions to install FTDI drivers > for my Mac, after which I connected to the BP using ‘screen’ as discussed > below. > > Update BP firmware using instructions posted here (I did not upgrade until > after I fixed my Chromebook but I hear it goes much faster if you do > upgrade): > http://wiki.yobi.be/wiki/Bus_Pirate#7816-3_T.3D0_at_arbitrary_baudrate > > If you haven’t yet, connect the USB cable from the Mac to the BP. > > If Parallels asks, choose to connect the new device to your Linux virtual > machine (VM). > > In Linux either open a Terminal (black screen with DOS-looking console > interface) or otherwise get to a bash prompt. Assuming you logged in as > ‘root’ simply type the commands below. If you aren’t root then preface > each set of commands with sudo. > > If Linux says you aren’t in the sudoers list then follow this guide ( > https://www.digitalocean.com/community/tutorials/how-to-edit-the-sudoers-file-on-ubuntu-and-centos) > > to fix the problem (FYI, I always use the program nano to edit > /etc/sudoers/ and have never had a problem. > > apt-get install screen > > apt-get install flashrom upx > > cd /home/<your username> > > mkdir core > > cd /core > > Any folder name will do; I used core just for the heck of it. > > wget " > https://johnlewis.ie/Chromebook-ROMs/coreboot-peppy-seabios-180714.rom"; > > This is the file for an Acer C720 Chromebook. If you are flashing any > other system this is not the right file. You can search on John’s > excellent site ( > https://johnlewis.ie/custom-chromebook-firmware/rom-archive/) for other > bioses built for other Chromebooks. There are a ton of bios downloads > available on the web. > > Find which port your BP is using to connect to your computer: > > cd /sys/class/tty > > ls -la | less > > look for something with a USB in it, such as ....USB1, etc > > connect to BP: > > screen /dev/ttyUSB1 115200 8N1 > > If screen failed to connect and aborted you may have the wrong number next > to ‘USB’. Double check the files in the /sys/class/tty folder….or just try > ...ttyUSB0 and see if it works :) > > hit the i key and you should see: > > Bus Pirate v3b > > Firmware v5.10 (r559) Bootloader v4.4 > > DEVID:0x0447 REVID:0x3046 (24FJ64GA002 B8) > > http://dangerousprototypes.com > > If so your BP is working. If not...google for help. > > Quit BP with: Ctrl-a \ > > I did not update the BusPirate firmware but folks indicated that it works > much faster if you do. > > Check that flashrom is install and can communicate with the bios chip: > > sudo flashrom -p buspirate_spi:dev=/dev/ttyUSB0 > > ** You must run the flashrom commands as root or with the sudo construct. > > If flashrom is not installed: sudo apt-get install flashrom > > I ended up with flashrom v0.9.5.2-r1546 > > Make sure you are in the directory that contains the .rom file you > downloaded from John’s site, then: > > /sys/class/tty# flashrom -V -p buspirate_spi:dev=/dev/ttyUSB1 -w > coreboot-peppy-seabios-180714.rom > > The command assumes that you are using USB1 to connect to the BP and that > ‘coreboot-peppy...’ is the right firmware file. > > Wait between 30 minutes and 10 hours and it should work. I started it and > went to sleep. It was done when I woke up the next morning. Remove the > SOIC clip and then hit the power button on the laptop. It should boot and > stop at “Select boot device:” screen (see below). Now you can install > Linux using a USB pen drive installation. > > > > FYI: I found instructions on the web that directed the command “flashrom > -VVV -p buspirate_spi:dev=/dev/ttyUSB0 -w bios.bin” but that did not work > for me. > > Install Debian Linux > > Download the newest version of Debian ( > https://www.debian.org/releases/wheezy/debian-installer/) > > and create a bootable USB stick using these instructions: > http://okomestudio.net/biboroku/?p=1986 > > These instructions assume you are using a working linux installation (I > used Debian on Parallels) but they might work on OSX, dunno. > > I used debian-7.7.0-amd64-netinst but the newest version (as of 1/29/2015 > is 7.8.0) would be this file: > > > http://cdimage.debian.org/debian-cd/7.8.0/amd64/iso-cd/debian-7.8.0-amd64-netinst.iso > > These commands worked for me. They help you locate the USB stick > (/dev/sdb1) and mount it (to the /media directory. dd copies the > installation iso file to the USB stick. The last command unmounts the USB > stick. > > sudo fdisk -l > > sudo mkdir /media/USB > > sudo mount -t vfat /dev/sdb1 /media/USB -o > uid=1000,gid=1000,utf8,dmask=027,fmask=137 > > sudo dd if=debian-7.7.0-amd64-netinst.iso of=/dev/sdb bs=4M; sync > > umount /media/USB > > Now insert the USB drive into the Chromebook, startup, press the ESC key > to select the boot menu, select the USB drive, run the installer, and > hopefully you now have Debian. > > FYI, for the install I choose to use the “Guided - use entire” option to > install Debian on the entire disk. In hindsight I should have created a 10 > gig partition for the OS so it would be easier to back up. > > The screen, trackpad, and kernel will need work. > > > Fix the screen resolution: > > Once booted change your screen resolutions: > > sudo nano /etc/default/grub > > then add these entries: > > GRUB_GFXMODE=1024x768x32 > > GRUB_GFXPAYLOAD_LINUX=keep > > Save and close. Then type update-grub > > > Fix the trackpad > > sudo nano /etc/apt/sources.list > > then add these lines: > > deb http://http.debian.net/debian wheezy-backports main > > deb-src http://http.debian.net/debian wheezy-backports main > > Save and close. Then type sudo apt-get update to download a list of > possible upgrades > > Type: sudo apt-get install linux-image-3.16.0-0.bpo.4-amd64 -t > wheezy-backports > > Reboot. > > Enter the following commands: > > wget “ > https://raw.githubusercontent.com/liangcj/AcerC720CrunchBang/master/c720crunchbangtp_v2 > ” > > sudo chmod 0755 c720crunchbangtp_v2 > > sudo ./c720crunchbangtp_v2 > > Reboot. Touchpad should be working. > > > Update the kernel > > On your Chromebook go here: https://blog.mdosch.de/ and either 1) click > the “kernel” tag (usually in red) to download the kernel (.deb file) or > copy the link and use wget to download it in terminal. Either way, get the > file. > > Example file: > http://files.mdosch.de/2015-01/linux-image-3.18.4-c720_20150127_amd64.deb > > Ex: wget “ > ... -- -- You received this message because you are subscribed to the Linux Users Group. 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