diff options
| -rw-r--r-- | docs/gnulinux/encrypted_parabola.md | 2 | ||||
| -rw-r--r-- | docs/install/index.md | 12 | ||||
| -rw-r--r-- | docs/install/t500_external.md | 7 | ||||
| -rw-r--r-- | www/faq.md | 44 |
4 files changed, 52 insertions, 13 deletions
diff --git a/docs/gnulinux/encrypted_parabola.md b/docs/gnulinux/encrypted_parabola.md index 48ef5b76..5ff070a6 100644 --- a/docs/gnulinux/encrypted_parabola.md +++ b/docs/gnulinux/encrypted_parabola.md @@ -422,7 +422,7 @@ Edit configuration in `/etc/default/grub`, remembering to use UUID when poitning Use `blkid` to get list of devices with their respective UUIDs. Next generate grub.cfg with - # grub-mkconfig /boot/grub/grub.cfg + # grub-mkconfig -o /boot/grub/grub.cfg If you have separate `/boot` partition, don't forget to add `boot` symlink inside that points to current directory diff --git a/docs/install/index.md b/docs/install/index.md index 78d49eb0..b54dca15 100644 --- a/docs/install/index.md +++ b/docs/install/index.md @@ -62,10 +62,12 @@ they don't have to build anything from source on their own. The ROM images in each archive use the following at the end of the file name, if they are built with the GRUB payload: `*_*keymap*_*mode*.rom` -Available `modes`: `vesafb` or `txtmode`. The `vesafb` ROM images -are recommended, in most cases; `txtmode` ROM images come with -MemTest86+, which requires text-mode instead of the usual framebuffer -used by coreboot native graphics initialization. +Available modes: vesafb or txtmode. The vesafb ROM images are recommended +for regular use, but when flashing for the first time use txtmode version, +as it comes with Memtest86+, which requires text-mode instead of the usual +framebuffer used by coreboot native graphics initialization. +Machine should be tested with Memtest86+ after each reassembly or changing +from vendor bios to libreboot due to differences in raminit code. `keymap` can be one of several keymaps that keyboard supports (there are quite a few), which affects the keyboard layout configuration that is @@ -244,7 +246,7 @@ Flash chip size Use this to find out: - # flashrom -p internal -V + # flashrom -p internal All good? --------- diff --git a/docs/install/t500_external.md b/docs/install/t500_external.md index c9b85a5d..9e114bca 100644 --- a/docs/install/t500_external.md +++ b/docs/install/t500_external.md @@ -362,11 +362,12 @@ Not to be confused with wifi (wifi is fine). Memory ====== -You need DDR3 SODIMM PC3-8500 RAM installed, in matching pairs -(speed/size). Non-matching pairs won't work. You can also install a +DDR3 SO-DIMM sticks will work at PC3-8500 clock and voltage, so make sure that +timings of sticks are matched while they operate at its frequency. +Non-matching pairs won't work. You can also install a single module (meaning, one of the slots will be empty) in slot 0. -Make sure that the RAM you buy is the 2Rx8 density. +Make sure that the RAM you buy has 2Rx8 arrangement when buying 4GiB modules. [This page](http://www.forum.thinkpads.com/viewtopic.php?p=760721) might be useful for RAM compatibility info (note: coreboot raminit is @@ -140,6 +140,15 @@ around this by running the following command: You can find *cbfstool* in the \_util archive with the libreboot release that you are using. +What are the ata/ahci errors I see in libreboot's GRUB? +----------------------------------------------------------------------- + +You can safely ignore those errors, they exist because we can't quiet down +cryptomount command from `for` loop in libreboot's +[grub.cfg](https://notabug.org/libreboot/libreboot/src/r20160907/resources/grub/config/menuentries/common.cfg#L66). +It could be fixed in upstream grub by contributing patch that would add +quiet flag to it. + Hardware compatibility ====================== @@ -900,10 +909,8 @@ connect SATA HDDs via USB. Libreboot documents how to install several distributions with full disk encryption. You can adapt these for use with USB drives: -- [Full disk encryption with - Debian](../docs/gnulinux/encrypted_debian.md) -- [Full disk encryption with - Parabola](../docs/gnulinux/encrypted_parabola.md) +- [Full disk encryption with Debian](../docs/gnulinux/encrypted_debian.md) +- [Full disk encryption with Parabola](../docs/gnulinux/encrypted_parabola.md) The current theory (unproven) is that this will at least prevent malicious drives from wrongly manipulating data being read from or @@ -1034,3 +1041,32 @@ Are other operating systems compatible? Unknown. Probably not. +Where can I learn more about electronics +========================================== + +* Basics of soldering and rework by PACE + Both series of videos are mandatory regardless of your soldering skill. + * [Basic Soldering](https://www.youtube.com/watch?v=vIT4ra6Mo0s&list=PL926EC0F1F93C1837) + * [Rework and Repair](https://www.youtube.com/watch?v=HKX-GBe_lUI&list=PL958FF32927823D12) +* [edX course on basics of electronics](https://www.edx.org/course/circuits-electronics-1-basic-circuit-mitx-6-002-1x-0) + In most countries contents of this course is covered during + middle and high school. It will also serve well to refresh your memory + if you haven't used that knowledge ever since. +* Impedance intro + * [Similiarities of Wave Behavior](https://www.youtube.com/watch?v=DovunOxlY1k) + * [Reflections in tranmission line](https://www.youtube.com/watch?v=y8GMH7vMAsQ) + * Stubs: + * [Wikipedia article on stubs](https://en.wikipedia.org/wiki/Stub_(electronics)) + * [Polar Instruments article on stubs](http://www.polarinstruments.com/support/si/AP8166.html) + With external SPI flashing we only care about unintended PCB stubs +* Other YouTube channels with useful content about electronics + * [EEVblog](https://www.youtube.com/channel/UC2DjFE7Xf11URZqWBigcVOQ) + * [Louis Rossmann](https://www.youtube.com/channel/UCl2mFZoRqjw_ELax4Yisf6w) + * [mikeselectricstuff](https://www.youtube.com/channel/UCcs0ZkP_as4PpHDhFcmCHyA) + * [bigclive](https://www.youtube.com/channel/UCtM5z2gkrGRuWd0JQMx76qA) + * [ElectroBOOM](https://www.youtube.com/channel/UCJ0-OtVpF0wOKEqT2Z1HEtA) + * [Jeri Ellsworth](https://www.youtube.com/user/jeriellsworth/playlists) +* Boardview files can be open with [OpenBoardview](https://github.com/OpenBoardView/OpenBoardView), +which is free software under MIT license. + +Use of youtube-dl with mpv would be recommended for youtube links |