Dude, what are you yammering on about ?
On Sat, Dec 19, 2015 at 9:58 AM, Kenneth Martin <[email protected]>
wrote:
> Yes, I am starting to see that Jessie has issues:
>
> 1) 7+ full 10 hour days (some larger not many smaller) to get wired and
> wired connections (and/or), with fixed IPs, com miserable at boot and
> compatible with either 192.168.0.0/24 or 192.168.1.0/24 subnets (subnet
> unknown at boot); finally successful (but can't help wining as this is only
> the very first step on getting the new flash upgrade to work), and a
> jury-rigged re-invent the wheel solution is guaranteed to be a problem (at
> least I'm getting better with bash scripting; yech!). Recommendation: we
> need a network manager not developed for desktops in fixed and known
> environments, but for headless computers with unknown devices and routers
> at boot. Also, maybe bashdb should included by default (a suggestion for
> Robert as if he doesn't have enough to do yet - any word on the X15? - is
> there still an FCC issue?)
>
> 2) BBB rev. C with Jessie, with both USB to ubuntu host, and with power to
> 5V connector (required for wireless dongle) almost always reboots at >sudo
> shutdown -h now; doesn't happen without the usb connection.
>
> 3) Sometimes (not often but certainly occasionally) on >sudo reboot, BBB
> reboots, but no LEDs come on; it has booted up as holding the "power/reset"
> switch down of 10s does turn off the BBB.
>
> Good news, I can boot the BBB over either wireless (Tl-WN722N or
> TL-WN821N) or eth0 with both Asus (192.168.1.0/24 and TPLINK (
> 192.168.0.0/24) routers, but the time from reboot to login can be quite
> large (time varies). This would not have been possible without the usb0
> always coming up when it is hot-plugged in - this can sometimes take
> several minutes but seems to always work - thanks Robert (I assume this was
> you).
> Recommendation: do not use bash scripting unless you really need to; it
> has many many subtle gotchas, is very non-intuitive, is very complicated
> with many special ways of doing things that can only be learned using a lot
> of time and searching on how to do things (i.e. powerful but non-efficient
> for newbies). For a beginner, every line of code needs to be single stepped
> through using bashdb, get very familiar with >pr and >ev. Recommendation: I
> really wish I had started with pyroute2 (hoping to find time to redo).
> Other recommendations: get things working using > sudo ip (or #ip) before
> scripting, and get familiar with /sys/class/net.
>
> Item 0: I tried originally with connman, and got nowhere; I then tried
> with systemctl-networkd; this worked fine for a known environment, but I
> again I got nowhere with an unknown device and unknown sub-net; I gave up
> on both and went to custom bash scripts mostly using ip and ping (yech!
> this re-inventing the wheel should not be needed (and again is pretty well
> guaranteed to come back and get me in the future); unix was first written
> almost 45 years ago; if anything networking has deteriorated). I maybe
> should have installed NetworkManager and run with it, but it's not easily
> managed in an unknown environment (i.e. it's designed to have known devices
> described in /etc/network/interfaces, I don't know how to use it with
> unknown devices and unknown subnet without using DHCP which doesn't allow
> for fixed IPs - which I need). Note: without a network manager, you need to
> enable wpa_supplicant.service.
>
> Item 1: many of my initial problems were due to a route on eth0 being set
> even when the eth0 cable was not plugged in. This meant wlan0 (or wlan1
> depending usually but not necessarily on dongle used), could not be used
> without an >sudo route flush dev eth0. I now bring up a device, see if it
> works, and if not, flush everything (for that device) and bring it back
> down before bringing up the other device. With more time, I will use both
> wired and wireless, but that's for later. Currently, if both devices,
> wireless is used (I may change this).
>
> Item 2: adding an address (perhaps temporary) to a device, such as>sudo ip
> addr add 192.168.0.174/16 (for example - the important thing is the /16)
> allows both 192.168.0.1 to be pinged (kind of obvious), but also allows
> 192.168.1.1 to be pinged (this was not obvious to me, which allows one to
> determine which subnet the BBB is on). After determining the subnet, I go
> back to /24 addressing.
>
> Item 3: after bringing up a device, the time needed before successful
> pinging varies. Currently, I bring up a device, wait 3 seconds, try a ping,
> look at results, and if unsuccessful, try again up to 5 times, it usually
> works on iteration #2 (sometimes on #1 but not often), I've only seen 3
> iterations require once (well maybe twice - but after 7+ 10 hour days
> blindly attempted hundreds of different things, my memory and attention get
> hazy); I'm guessing this is very environment dependent.
>
> Question: is there something out there I am not aware of that wouldn't
> have taken so much time? Maybe I shouldn't ask this question as a Yes
> answer will make me look pretty foolish; at least I can now read bash code,
> for example:
> dev=$2
> : ${dev:=eth0}
> and the difference between ((...)) and $(...) and ${...} (not to mention
> `...`) (and finally needing spaces and ';' in if [ condition ]; then) and
> why both fi and done are required, and (finally, finally, why "${var1}" is
> different from ${var1} - looks after null case); again yech! what a
> convoluted language (it could be worse, I might have had to use perl or
> even worse apl?)
>
> Summary: I think I've gotten bashophobia; if only we could get a true
> binary compiler for python?.
> p.s. anyone used trepan2 with Jessie?
>
> On 15-12-19 03:50 AM, Maurice H. wrote:
>
> There are still a lot of roblems with the Jessie image. At this moment I'd
> advice to go for Wheezy.
>
> On Tuesday, 15 December 2015 21:45:25 UTC+1, Bit Pusher wrote:
>>
>> I'm starting to update from an outdated image and to be clean am planning
>> on starting from scratch with a newly flashed image.
>> On http://beagleboard.org/latest-images there are two possible Debian
>> images from Nov. 12'th, Wheezy 7.9 and Jessie 8.2. It is not clear
>> which image I should use. I'm using the PRU and SPI1 (which also
>> previously required SPI0 to be loaded) and many python modules. I load the
>> PRU, SPI0 and SPI1
>> using three device tree overlays. Could someone recommend which image to
>> use? Thanks and appreciated.
>>
> --
> For more options, visit http://beagleboard.org/discuss
> ---
> You received this message because you are subscribed to a topic in the
> Google Groups "BeagleBoard" group.
> To unsubscribe from this topic, visit
> https://groups.google.com/d/topic/beagleboard/tdt1TTix7aE/unsubscribe.
> To unsubscribe from this group and all its topics, send an email to
> [email protected].
> For more options, visit https://groups.google.com/d/optout.
>
>
> --
> For more options, visit http://beagleboard.org/discuss
> ---
> You received this message because you are subscribed to the Google Groups
> "BeagleBoard" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to [email protected].
> For more options, visit https://groups.google.com/d/optout.
>
--
For more options, visit http://beagleboard.org/discuss
---
You received this message because you are subscribed to the Google Groups
"BeagleBoard" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
