Porting Halium to Nexus 7 deb

[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.

[doniks]

@amrith said in Porting Halium to Nexus 7 deb:

@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

No, no that thing is gone. Has been integrated into the halium docs long ago

[doniks]

@amrith said in Porting Halium to Nexus 7 deb:

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.

remember, my last posts with content here are from 2018 - long outdated! By now I have ubports UI running on the N7. All I needed is in the docs or in the pad.

Probably better to have the conversation about your errors in one place https://forums.ubports.com/topic/3112/ubport-new-device-porting-problem/ rather than spreading it over multiple threads

[amrith]

@doniks said in Porting Halium to Nexus 7 deb:

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!

this was the post i was referring you