Porting Halium to Nexus 7 deb

JBBgameich

Which debian rootfs are you using?
I just wanted to inform you that my work on the debian buster rootfs is now nearly finished and it boots to ssh, the lxc container starts and libhybris also works.
I have some pre-built one around here: https://archive.org/download/halium-debian-rootfs/halium-debian-rootfs_20171024.tar.gz and the source for the rootfs-builder has moved here: https://github.com/debian-pm/rootfs-builder.

doniks

@doniks said in Porting Halium to Nexus 7 deb:

patches

https://gist.github.com/doniks/75d16dda43d241feb79b721bab6c4940

FWIW, it might be conceivable to fix this thing about pidns_operations in a better way. I was poking around in the upstream kernel

git clone  --depth 1 --branch v4.13.11  https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
grep --color=always  -nr -C 3 -Ee'CONFIG_PID_NS|pidns_operations' |less -R

and I see some stuff that is not present in the kernel I use. But, well, that's for another day. Afterall, I don't even know whether it's an actual problem right now

Tonoxis

@JBBgameich I believe I was using the debian stable rootfs. Like I said, the issue was caused by an error I made while building the rootfs. I had forgotten to build the libhybris parts so it wasn't able to communicate with the Android parts once it was up and running, managed to fix that and get up and running.

My project trees have been put to the side for now because of my I.T. work, it hasn't left me much time for anything still. But I did see that there is now a flo image up on the ubports system image server.

(Ninja Edit: My custom 3.4.0-5 kernel tree builds again! Fixed the defconfig)

doniks

Trying to revive this again.

I can get the halium rootfs running as well as before, including test_hwcomposer.

But using the latest plasma rootfs, I get only a black screen. Also, I'm not hearing the audible PM greeting "Oh it's gorgeous".

I have replaced the vendor blobs with the ones provided by TheMuppets:

  <project
      path="vendor"
      name="proprietary_vendor_asus"
      revision="cm-14.1"
      remote="them"
      />

but that didn't help either.

syslog https://paste.ubuntu.com/26340223/ It continues forever and ever with the line kgsl kgsl-3d0: |kgsl_add_fence_event| invalid fence fd
logcat https://paste.ubuntu.com/26345905/ , repeats those four lines forever
lxc-checkconfig see here and there, definitely something to do there, including bugs in lxc-config :(, but I'm not convinced this is related to the problem at hand, since I got PM to work last August without having those lxc-checkconfig items solved

Any advice appreciated!

Update: it seems that the pm rootfs from 20171219 does work ok, but the one from 20171220 fails.

Update2: Another image from CI also works http://mobile.neon.pangea.pub:8080/view/All/job/generic_rootfs/68/artifact/result/halium-rootfs-generic.tar.gz

Update3: But with both, 1219 and 68/artefact the system doesn't react to touch AFTER unlocking. The lock screen itself looks ok

plasma_logs: https://paste.ubuntu.com/26370483/
logcat : https://paste.ubuntu.com/26370484/
dmesg: https://paste.ubuntu.com/26370482/

Update4: With some playing around I found that the first "bad" image is 1210. Images before are ok. Then I was playing around with 1210 for a while, and it actually became unfrozen. I'm not 100% sure what I did but I think it went something like this:

systemctl disable NetworkManager
systemctl mask NetworkManager 
reboot 
...
# frozen 
systemctl unmask NetworkManager 
systemctl enable NetworkManager 
loginctl kill-session c1 
# screen goes dark 
systemctl stop simplelogin 
systemctl start simplelogin 
# htop shows a busy system including plasma and kwin stuff 
echo 200 > /sys/class/leds/lcd-backlight/brightness
# shows the lock screen 
# unlock 
# kwallet wizard shows 
# cancel 
# normal system shows and 
# is NOT frozen, I can start chromium!

Oh, and I did also enable wifi (`echo 1>/dev/wcnss_wlan ;
echo sta > /sys/module/wlan/parameters/fwpath ;
nmcli dev wifi connect <SOMEOPENWIFI> ) but I can't remember where in the sequence above.

doniks

I'm trying to get ubports-boot to work follwing
https://docs.ubports.com/en/latest/porting/introduction.html and
https://github.com/ubports/docs.ubports.com/pull/67

but I'm stuck at usb iSerial saying "I hit a nail" and then it goes into telnet.

I think I tracked it down to
mount -o bind ${rootmnt}/run/image.fstab $FSTAB || panic "drop to adb" panicking, which in turn seems to be due to this line mount -o rw,nosuid,noexec,relatime,mode=755 -t tmpfs tmpfs ${rootmnt}/run
https://github.com/ubports/ubports-boot/blob/master/initramfs/scripts/touch#L377 failing with status 255.

This is my dmesg https://paste.ubuntu.com/26384482/
with some extra logging I have added prefixed with UT.init
anybody has a clue?

Update: Somehow I had the image files mixed up. Be sure to clean /data up if you go from halium/pm rootfs' to ubports.

Next hickup was a problem with sshd, workaround is here: https://gist.github.com/doniks/2ac14a1bb6750165bf782f62139c8aab#file-gistfile1-txt-L61

Now I have ssh access but lxc isn't working, seems something went wrong again with rootstock and installing the android image.

To be continued ....

doniks

May I introduce:

the Halium Porting Error Knowledge Base

https://gist.github.com/doniks/2ac14a1bb6750165bf782f62139c8aab#file-gistfile1-txt-L61

doniks

@doniks said in Porting Halium to Nexus 7 deb:

I'm trying to get ubports-boot to work follwing
https://docs.ubports.com/en/latest/porting/introduction.html and
https://github.com/ubports/docs.ubports.com/pull/67

I've reached ssh now, I can test_lights, but no UI, test_hwcomposer segfaults and when I run unity-system-compositor, I get the following in logcat : https://paste.ubuntu.com/26431933/

doniks

Gave it another spin.

The general steps to get deb working are much simplified since it's all in github now: https://github.com/Halium/halium-devices/blob/halium-7.1/manifests/asus_deb.xml - just follow the halium documentation. However, I'm wondering whether I should leave the OP as is, some people have expressed that it helped them in their ports to see the journey ...

Plasma mobile hasn't been sleeping. I can tell that the newer images work much better than previously.

For ubports, I made another attempt, but no GUI so far. Any tipps appreciated!

What I did in detail:

Follow the steps on https://docs.ubports.com/en/latest/porting/introduction.html
in rootstock-touch-install
- insert the line do_shell "rm -f /data/system.img" as the first line in prepare_ubuntu_system, otherwise we have that thing left over from halium
- insert the line IMAGE_SIZE=$(( $IMAGE_SIZE * 2 ))right after that variable is set, otherwise the image is too small, so I just double it
- delete the line do_shell "ln /data/ubuntu.img /data/system.img", otherwise I end up with an empty system.img on the device ... Not sure what the problem was exactly, I think something goes wrong with the loop devices stepping on each others toes .. not sure
now I can install using the latest ubports xenial root fs: build 298 form https://ci.ubports.com/job/xenial-rootfs-armhf/
at first that wouldn't boot, so ...
I make ubports boot a bit more verbose halium/ubports-boot
- append quite=n debug=y to the UBPORTS_BOOTIMG_COMMANDLINE in Android.mk
- insert [ -f /dev/kmsg ] || mknod -m 600 /dev/kmsg c 1 11 in initramfs/init right before the mkdir -p /var/lock line
- change the line in initramfs/scripts/functions : _log_msg() from printf "$@" to printf "$@" | tee /dev/kmsg
- now I could sprinkle around log_warning_msg blabla in initramfs/init and see everything nicely in last_kmsg.
- eventually I found that it panics at the line: mount -n -o move /proc ${rootmnt}/proc ... I have simply commented this line for the moment, that avoids the panic and
now it boots into the ubports rootfs
however, no GUI comes up
in /var/log/lightdm/lightdm.log I see

Launching process 2998: /usr/share/ubuntu-touch-session/usc-wrapper --file '/run/mir_socket' --from-dm-fd 11 --to-dm-fd 14 --vt 1
[...]
DisplayServer: Unity system compositor stopped

usc-wrapper is a script. when I run the command inside: unity-system-compositor --disable-overlays=false --spinner=$SNAP/usr/bin/unity-system-compositor-spinner --file '/run/mir_socket' --from-dm-fd 11 --to-dm-fd 14 --vt 1
I get a Segmentation fault (core dumped)
when I run at the same time /system/bin/logcat | grep -Eve "NetlinkListener|rmt_storage" I don't see anything logged at the time of the segfault

logcat: http://paste.ubuntu.com/p/kz7JSTfgTR/
syslog: http://paste.ubuntu.com/p/JVQJ2mg98G/
dmesg: http://paste.ubuntu.com/p/MPvwKtYhsS/

Not sure what to do next. Maybe try halium-boot, maybe check the

lxc-checkconfig: http://paste.ubuntu.com/p/5Z6w8Kwcm6/

it still flags some things. Also, mabye related, I get

# lxc-attach -n android
lxc-attach: cgroups/cgfs.c: lxc_cgroupfs_attach: 2538 could not move attached process 10995 to cgroup of container
lxc-attach: attach.c: lxc_attach: 992 Expected to receive sequence number 0: No such file or directory.

However,

# lxc-info -n android
Name:           android
State:          RUNNING
PID:            1116
IP:             10.15.19.82
IP:             192.168.179.127

and it's all seemingly good enough for plasma mobile, so not sure.

Again, tips welcome!

advocatux

@doniks just in case you don't know it, there's a UBports Porting group in Telegram (https://t.me/ubports_porting)

doniks

Thanks! I do know And I did get invaluable help from there! I would be no where without it.

However, after piling up a couple of hacks I find it helpful to take a step back and summarize the status quo again which is hard in irc/telegram.

And also, I like to mix the different styles of working: Specific tips for a specific problem in the more ad-hoc irc and the long haul, asynchronous conversation of a forum/mailing list.

Oh wait ... ubports porting. No I didn't know that one! I was talking about the #halium channel. I'll have a look. Thanks.

flohack

@doniks maybe @UniSuperBox can comment a bit on the manual tweaks you had to do for rootstocking the device, actually all should come out of the box somehow. Then, if plasma mobile shows a screen, we should be able to do this, too right?

BR

doniks

@flohack said in Porting Halium to Nexus 7 deb:

@doniks maybe @UniSuperBox can comment a bit on the manual tweaks you had to do for rootstocking the device, actually all should come out of the box somehow.

Well, in a way he did The PR for the update of docs.ubports is in, which means both ubports-boot and rootstock-install can take their bugs with them to the grave.

Then, if plasma mobile shows a screen, we should be able to do this, too right?

One would hope so. However, even with halium-boot (and a bunch more kernel configs it wanted) I managed just now to build and boot it, but I end up with the same segfaults

I spoke to @UniSuperBox and @bshah earlier today on telegram. There was a theory about something with libhybris and "N linker" but I didn't really get it and atm still just google logo.

amrith

this porting journal(idk what to call this) is really helpful thank you

amrith

@doniks not found

doniks

@amrith said in Porting Halium to Nexus 7 deb:

this porting journal(idk what to call this) is really helpful thank you

Great that you found it helpful! Maybe you want to write your own?! I think this one for N7 is very dated by now. Lots of things discussed here should be automatic/easier/well documented...

doniks

@amrith said in Porting Halium to Nexus 7 deb:

@doniks not found

?

amrith

@doniks said in Porting Halium to Nexus 7 deb:

May I introduce:

the Halium Porting Error Knowledge Base

https://gist.github.com/doniks/2ac14a1bb6750165bf782f62139c8aab#file-gistfile1-txt-L61

the link is not working

Lakotaubp

@amrith You might need to sign up/in for the link to work.

amrith

@Lakotaubp said in Porting Halium to Nexus 7 deb:

@amrith You might need to sign up/in for the link to work.

No i am already signed in . it shows 404 error

amrith

I have exactly same errors you have , unity-compositor stopped and if you run it as from the startup script you get segmentation fault
however
once you boot> login to ssh
execute

$sudo chown -R $USER /dev/input
$QML_BAD_GUI_RENDER_LOOP=1 QT_QPA_PLATFORM=mirserver unity8

while ubuntu spinner is active , you will get some flashes and you can see the unity is working in background.