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--- debian_uboot [2012/01/22 10:38] – Correct root= device to make initramfs work without additional tweaks paulf
+++ debian_uboot [2016/10/24 15:57] – [Debian hardfloat with upstream U-Boot] status updates paulf
@@ Line 1: / Line 1: @@
+====== Debian hardfloat with upstream U-Boot ======
 Here I'm documenting my progress on using my ac100-116 "the right way". Feel free to reach me on [[help#irc]], my nick is PaulFertser.
+**UPDATE 24 Oct 2016**: migrated the system to current upstream U-boot and Linux. Everything seems to be nice and reliable. The limitations section still applies.
+Some notes on update:
+  * Needs the latest (from firmware git) ''rt2870.bin'' for stable wifi
+  * Missing ''nvec_event'' so lid open/close events are not generated
+  * To be able to use ''synaptics'' X.org driver the ''elantech'' protocol needs to be forced for ''psmouse'' kernel driver
+  * ''mpv'' works nicely for unaccelerated video playback, including streaming from Youtube and other popular hostings (''ytdl-format=18'' is usually needed)
+===== Status =====
+==== What works ====
+  * Booting (currently fetching kernel+rootfs is a bit slow due to u-boot bug, ~15s)
+  * Display (both text console and X.org fbdev), keyboard, touchpad
+  * Wifi
+  * Bluetooth
+  * GSM/UMTS data transfer
+  * Stereo sound both on internal speakers and the headphones
+  * Webcam
+  * Integrated digital microphone
+  * External stereo headset with microphone
+==== What doesn't ====
+  * LCD and keyboard in u-boot (pending upstream patches and paz00 integration, http://news.gmane.org/group/gmane.comp.boot-loaders.u-boot/thread=122864, for keyboard NVEC support would be needed)
+  * Boot from USB in u-boot (http://news.gmane.org/group/gmane.comp.boot-loaders.u-boot/thread=122484)
+  * Resume from suspend-to-ram (pending u-boot warmboot patches, see http://news.gmane.org/group/gmane.comp.boot-loaders.u-boot/thread=122760)
+  * Suspend-to-disk/hibernation (not anytime soon, no upstream support for ARMs)
+  * tegra_wdt watchdog resets the system but it doesn't boot after that for the reasons unknown
+  * Proprietary drivers for X and OMX-accelerated sound/video decoding (never tried, see https://build.pub.meego.com/package/files?package=nvidia-tegra2&project=home%3Acxl000%3Atrimslice%3AMer%3Atesting , http://ppa.launchpad.net/ac100/ppa/ubuntu/pool/restricted/n/nvidia-graphics-drivers-tegra/ , mplayer-omx, gst-omx etc)
+===== Installation and initial configuration story =====
 U-boot doesn't support the display yet. Kernel initialises and uses the integrated panel and the backlight properly. It's possible that you'll manage this with a specially prepared bootloader that will boot from external SD automatically without a serial console.
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 Logged in, set password to 1, start ''wpa_supplicant -Dnl80211 -iwlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf &'', then ''dhclient eth0''. Installed ''openssh-server'' and switched to that (because the serial console sometimes stops to function).
-Installed ''gdisk'' and repartitioned from scratch ''/dev/mmcblk0'', creating two partitions there (one for /boot, 32M should be enough), another for LVM pv. Created LVM there, with two (for now) volumes: 1G for swap, and everything else for the rootfs. ''mkfs.nilfs /dev/emmc-lvm/rootfs''. Mounted it, and started to Debootstrap debian armhf according to the official manual (you'll need to read both installing debian and armhf chroot).
+Installed ''gdisk'' and repartitioned from scratch ''/dev/mmcblk0'', creating two partitions there (one for /boot, 32M should be enough), another for LVM pv. Created LVM there, with two (for now) volumes: 1G for swap, and everything else for the rootfs. ''mkfs.nilfs /dev/emmc-lvm/rootfs''. Mounted it, and started to Debootstrap debian armhf according to the official manual (you'll need to read both installing debian and armhf chroot, though debian-ports.org repositories are not needed).
 Copied ''/lib/firmware/rt2870.bin'' to the newly established system, configured ''/etc/network/interfaces'' to bring up wlan0 for my home wlan automatically. Created a symlink from ''/bin/true'' to ''/usr/sbin/mkfs.nilfs2'' to make the boot happy.
-Initramfs is a bit tricky: a workaround from http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=649288 is needed (it has a typo where .. is used instead of . and also the script should be made +x), and also you need to pay attention to using ''/dev/mapper/emmc--lvm-rootfs'' and not ''/dev/emmc-lvm/rootfs'' for the ''root='' kernel command line argument (see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=612402) or else initramfs won't call ''vgchange -ay automatically''. Add ''nilfs2'' to ''/etc/initramfs-tools/modules''. Make a symlink from ''initrd-3.0.8'' to ''initramfs'' in ''/boot''.
+Initramfs is a bit tricky: a workaround from http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=649288 is needed (it has a typo where .. is used instead of . and also the script should be made +x), and also you need to pay attention to using ''/dev/mapper/emmc%%--%%lvm-rootfs'' and not ''/dev/emmc-lvm/rootfs'' for the ''root='' kernel command line argument (see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=612402) or else initramfs won't call ''vgchange -ay automatically''. Add ''nilfs2'' to ''/etc/initramfs-tools/modules'' (if you're using ''MODULES=most''). Make a symlink from ''initrd-3.0.8'' to ''initramfs'' in ''/boot''. You'll also need a custom initramfs-tools addon script to add nilfs_cleanerd to the initramfs or you'll need to start it later from e.g. /etc/rc.local.
 The resulting system should be bootable with
@@ Line 50: / Line 79: @@
 </code>
-To manage lid event i'm using https://github.com/gandro/input-event-daemon, it should listen on /dev/input/event4 for LID:0 and LID:1 events.
+And then be sure to read suckless [[tips_and_tricks]].
-Playing mp3's (with libmad-based players) currently is buggy due to http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=656814 , fix available.