Ask Ubuntu General Room

Android Dev

00:01

@NathanOsman And then the errors become more and more frequent, to one in every ~400 by the bottom of that file

Nathan Osman

Analyzing...

Android Dev

:)

Thanks for taking time to help a random person on the 'net debug their code :)

Nathan Osman

Here's the offsets between problem bytes:

They appear to be multiples.

What are the image dimensions?

Android Dev

Just a sec, I'll let you know!

Nathan Osman

408 * 2 = 816
408 * 3 = 1224

So that explains the numbers you're seeing.

We need to determine the significance of 408.

Android Dev

00:06

3264 x 2448 pixels

Nathan Osman

Both numbers divide evenly by 408.

Interesting.

Could it be an off-by-one error somewhere?

Fabby

thumbs up to@NathanOsman

Android Dev

But if it were an off by one error, then wouldn't it thow an ArrayOutOfBounds Exception?

Fabby

(or: why Nathan is a kick-arse developer)

Nathan Osman

@AndroidDev Do you have the code for looping over the bytes anywhere?

Fabby

00:09

Development is more like magic then science!

Nathan Osman

I've got to disappear for a few minutes to eat supper.

(Pizza!)

Android Dev

Ooooh, count me in :D

Edity

ooh no april fools

Fabby

@NathanOsman What kind of?

Nathan Osman

Hawaiian.

Android Dev

00:10

Which looping code did you want to look at?

Edity

hoi

TheXed

hio

Edity

it's april fools

>>>>:::::(((

Fabby

@Edity Which TZ are you in?

Edity

@Fabby nz timezone

Fabby

00:13

Ah, yes... day time for you already!

Edity

:D

Fabby

I'm going to sleep....

02:14

Edity

gnight

Fabby

Good night all!!!!

Edity

night

Fabby

00:15

I liked the "gnight" better! ;-)

Android Dev

@NathanOsman - Here's the loop for ORing/ANDing the payload with the cover image: paste.ubuntu.com/24290992

Edity

lol

Android Dev

@NathanOsman - And here's the loop for retrieving the embedded payload: paste.ubuntu.com/24291002

Edity

afk

Sergiy Kolodyazhnyy

sigh . . . i should be charging for tutoring python

but since it's my good friend, i guess my conscience doesn't let me

My character is not dicky enough

Kaz Wolfe

00:23

hm... i wonder that guy with alts did that...

i mean, you get much more rep from just writing high-quality answers.

DenisKa

# mount -o rw,remount /dev/sda4 /media/root -v
mount: /media/root not mounted or bad option

       In some cases useful info is found in syslog - try
       dmesg | tail or so.

why do I keep on getting this?

and yes hello :P

Kaz Wolfe

Because remount doesn't like having a mountpoint.

If you want to remount /dev/sda4, do mount -o remount,rw /dev/sda4 or mount -o remount,rw /media/root

Sergiy Kolodyazhnyy

also incorrect syntax, you shouldn't put -v at the end

DenisKa

# mount -o remount,rw /media/root
mount: /media/root not mounted or bad option

       In some cases useful info is found in syslog - try
       dmesg | tail or so.
# mount -o remount,rw /dev/sda4
mount: /dev/sda4 not mounted or bad option

       In some cases useful info is found in syslog - try
       dmesg | tail or so.

Sergiy Kolodyazhnyy

so . . . i've had a shot of this french brandy just now . . . i don't think i'll be producing any answers tonight . . .

DenisKa

00:26

same thing :(

Kaz Wolfe

Then, it's not mounted. So you can't remount it. mount -o rw /dev/sda4 /media/root.

DenisKa

@KazWolfe oh this worked thanks

Kaz Wolfe

np

Kaz Wolfe

00:39

now... what should i use pgp for...

Sergiy Kolodyazhnyy

@KazWolfe send me encrypted love letters ?

Android Dev

Lol!

Kaz Wolfe

if anyone wants a fun question: askubuntu.com/questions/899016/how-do-i-format-this-dell-usb

Android Dev

@KazWolfe I would say try this, askubuntu.com/questions/745907/… but looks like you already tried it

Kaz Wolfe

@AndroidDev I did. It jumps right back to R/O

Sergiy Kolodyazhnyy

00:51

@KazWolfe it's likely that USB is a toast

Kaz Wolfe

@SergiyKolodyazhnyy see link

there's a way to do it, but in windows only.

WinEunuuchs2Unix

I bought a bottle of champagne (first in my life) three weeks ago and I didn't know why until now... I'll open it when I hit 10K in AU :D... Happy Friday everyone :)

@SergiyKolodyazhnyy You are using your real name? I thought it was spelled a little differently on github when I saw it 2 months ago.

Sergiy Kolodyazhnyy

@WinEunuuchs2Unix Happy Friday ! I'll have my second shot of whiskey for your 10k

Android Dev

@NathanOsman - Since the entire program is only 194 lines, here's it is in its entirety: paste.ubuntu.com/24291145

Sergiy Kolodyazhnyy

@WinEunuuchs2Unix it is spelled differently on github. But this is full name

WinEunuuchs2Unix

00:53

Well I hope you want to be a tea-tottler (sp?) because my 10k is going very very slow.

You know I would have had 500 more points if Jorge Castro accepted my answers on his bounties but he procrastinated (or didn't care!) and I only got 1/2 points based on votes.

ie I would be 10K already.

Sergiy Kolodyazhnyy

take your time

WinEunuuchs2Unix

Good advice I will

Journeyman Geek

@Fabby That dirty dog... ;p

WinEunuuchs2Unix

I used to be very keen on getting points too much such that I would rush to write poor answers on my cell phone and have to delete them when I got on my computer.

Journeyman Geek

@SergiyKolodyazhnyy What about the ballmer peak?

WinEunuuchs2Unix

00:56

Now new points are like "meh" I'd rather be writing new applications.

Journeyman Geek

@WinEunuuchs2Unix Its all about quality not quantity

WinEunuuchs2Unix

@JourneymanGeek Ballmer Peak.... on beer number four :)

Yes I concur on quality.

Journeyman Geek

(or you HNQ on a crappy answer ><)

which I find embarassing

Sergiy Kolodyazhnyy

@JourneymanGeek I'm yet to see its effect on me

WinEunuuchs2Unix

Plus it's about self-fulfillment... I'd rather spend 2 weeks writing code I love that only gets 2 votes than 10 minutes answering a question that gets 20 votes.

Nathan Osman

00:58

@AndroidDev wait, so it's using an int for the RGB value?

WinEunuuchs2Unix

Don't you need three integers?...lol

Nathan Osman

RGB is only 24-bit - where is the additional channel coming from?

@WinEunuuchs2Unix A four-byte integer can store four 8-bit values.

The fourth channel is usually either ignored or used for alpha.

WinEunuuchs2Unix

yes... 255,255,255

Sergiy Kolodyazhnyy

well, it's much more complex than that

there's 32 bit ones now, i think

Android Dev

@NathanOsman Yeah

WinEunuuchs2Unix

01:00

when I was C coding an integer was 2 bytes and a long integer was 4 bytes.

Sergiy Kolodyazhnyy

For example unity launcher requires numbers like 0000ffff

so 4 bytes

WinEunuuchs2Unix

I kind of miss C :(

Nathan Osman

@SergiyKolodyazhnyy Well, I know there are other color encodings.

Android Dev

@WinEunuuchs2Unix In Java, a short is 2 bytes and an int is 4 bytes

Nathan Osman

But we're dealing with a BMP here.

WinEunuuchs2Unix

01:01

@AndroidDev I began coding when 20 bit addresses were the max... 8086

Sergiy Kolodyazhnyy

I don't know anything about BMP anyway

Nathan Osman

@WinEunuuchs2Unix In C++ (not sure about C) the standard doesn't actually state how much space each type occupies, only the minimum and the range of values it must support.

Sergiy Kolodyazhnyy

i just blah what i know

Android Dev

@NathanOsman Originally, I had it exporting PNG, but I switched to BMP to see if it would fix the incorrect bits.. which it didn't :(

Nathan Osman

@SergiyKolodyazhnyy It has a few different encodings, but the most common is 24-bit - 8-bits for each channel.

Sergiy Kolodyazhnyy

01:03

@NathanOsman yeah, there's standards in C. So atomic types have specific bit size, but it can vary by dialect. For example in standard C char is like what . . . a byte , 2 bytes ? In PIC microcontrollers chars are 1 byte specifically

WinEunuuchs2Unix

My grub boot is 1920x1080 - 32 bit according to vbeinfo but I can only max out splash screens at 1600x900 for some reason.

Fabby

@JourneymanGeek :D :D :D

Ubuntu Questions on U&L

0

Q: cron @reboot doing nothing

Running Mint 18.1 Serena, but I am sshing into the box vs. using the gui. I've tried everything. Here's my cron entry: @reboot sleep 60;/bin/sh /home/test/Applications/scripts/startup.sh This is in user test's crontab -l. folder permissions: File: 'scripts/' Size: 4096 Blocks: 8 ...

WinEunuuchs2Unix

Hey @Fabby heck of a long time no see... How is Germany or Brussels or whereever you are hanging your hat today?

Fabby

@WinEunuuchs2Unix 1680x945 by any chance?

Android Dev

01:05

@NathanOsman - It's a really simple program; I don't see where I went wrong

Fabby

@WinEunuuchs2Unix Brussels today, Cork, Ireland until this morning....

¯\_(ツ)_/¯

WinEunuuchs2Unix

@Fabby I haven't tried a 1680x945 picture yet.... If 1600x900 works is it worth the effort?

@Fabby UK wants guarrantee the Northern Ireland will not separate under rule 50.

Or something like that.

Fabby

No, but 1680x945 is a VESA resolution, so your card might boot up in hardware like that....

Nathan Osman

@AndroidDev This is interesting: en.wikipedia.org/wiki/BMP_file_format#Pixel_format

Fabby

@WinEunuuchs2Unix you Irish???

WinEunuuchs2Unix

01:08

No my card boots up in 1920x1080 just fine... It's just grub splash screen doesn't show the images at that resoulution

Nathan Osman

But I'm not sure I see anything wrong there either.

WinEunuuchs2Unix

@Fabby I'm Irish one day a year March 17th.

Fabby

@WinEunuuchs2Unix :D

Nathan Osman

Aha!

Fabby

@WinEunuuchs2Unix Lemme look that up....

WinEunuuchs2Unix

01:09

Thanks but you don't have to waste your time on me... it's not even a high priority for myself.

Today's challenge is YAD progress bars

Nathan Osman

@AndroidDev I have an idea... You are reading each pixel as a 32-bit integer, but when you create the bitmap, you are specifying BufferedImage.TYPE_INT_RGB

So maybe some of the information is being lost...

I'll have to look further...

Fabby

@WinEunuuchs2Unix OK... I'm very good at doing nothing! >:-)

WinEunuuchs2Unix

@Fabby You should be Junker president of EU then.

Android Dev

@NathanOsman - Just for grins here's the output when using a 1920x1200 image: paste.ubuntu.com/24291237

Sergiy Kolodyazhnyy

mmmm, second shot might not go through

im quite sleepy

WinEunuuchs2Unix

01:12

@AndroidDev That looks like Plymouth debug....

I know I said "splash screen" I meant grub background image!

My splash screen is "Space Sunrise" and it works great in Plymouth, but I wish I could make it start in init-top and end later.

Fabby

@WinEunuuchs2Unix :-)

Sleep!!!!

gnight all

WinEunuuchs2Unix

Yeah it's like 4am his time or something.

@AndroidDev just reread your pastebin definitely not Plymouth Debug but it is dated for "April Fools' Day" :p

Android Dev

:)

You wouldn't happen to see the bug in my code, would you? http://paste.ubuntu.com/24291145/

Sergiy Kolodyazhnyy

didn't feel the second shot

probably because i chased it with some barbecue

well, at least i might sleep well tonight

WinEunuuchs2Unix

01:32

@AndroidDev The only bug I see is 8 tab stops instead of 4 like I use :/ Sorry I'm very rusty at C in the first place and flunked out of graphics in the second place.... All my coding is limited to information management / accounting, etc.

Sergiy Kolodyazhnyy

@WinEunuuchs2Unix that's Java

WinEunuuchs2Unix

@SergiyKolodyazhnyy I saw the Java imports at top of file, but it looked like C to me with // comments and what not.

Sergiy Kolodyazhnyy

@WinEunuuchs2Unix yeah, because Java uses some C-style syntax

TheWanderer

Guys

Sergiy Kolodyazhnyy

@AndroidDev any particular error ?

@TheWanderer yeah ?

TheWanderer

01:34

I derped again

Sergiy Kolodyazhnyy

@TheWanderer how derpy did you derp ?

TheWanderer

I decided to use a switch statement

Sergiy Kolodyazhnyy

so ?

TheWanderer

But I forgot to break

WinEunuuchs2Unix

Let me guess @TheWanderer is really old Zach?

TheWanderer

01:34

And I spent an hour changes things

Changing

Sergiy Kolodyazhnyy

Oh . . . so it was falling through to other cases

Ubuntu Questions on U&L

0

Q: Does anyone know of a way to display thumbnails for contact / vcf / vcard files in Nautilus or another file browser in Ubuntu 14.04?

Does anyone know of a way to display thumbnails for contact / vcf / vcard files in Nautilus or another file browser in Ubuntu 14.04? We were trying to put this together but were unsuccessful but received dozens of "I want this too" comments from other users and friends. Would be a simple way t...

ubuntu nautilus thumbnails vcards

TheWanderer

@SergiyKolodyazhnyy yerpy derpy

Sergiy Kolodyazhnyy

Happens to the best of us. No worries

TheWanderer

At least I'll be able to individually color my quick toggles after this

@WinEunuuchs2Unix mayyyyyyyybeeeeeeeeee

Sergiy Wergiy

@SergiyKolodyazhnyy next name? ^

Sergiy Kolodyazhnyy

01:39

@TheWanderer nah, Sergius Maximus

TheWanderer

Lol

I like sergiy wergiy better

WinEunuuchs2Unix

@TheWanderer I was thinking of a name change today too... WindowsUnix.

TheWanderer

Hue

WinEunuuchs2Unix

The "Hue" definitely smells of Zacharee1

TheWanderer

Hue?

WinEunuuchs2Unix

01:41

who?

TheWanderer

Hua

Sergiy Kolodyazhnyy

@WinEunuuchs2Unix just go with Rick . . . it already shows up in your prompt when you copy paste your terminal text into questions/answers. Why not make it simpler

TheWanderer

RollingRick

WinEunuuchs2Unix

@SergiyKolodyazhnyy It shows up in my bug reports too.

Sergiy Kolodyazhnyy

@TheWanderer hua is chinese word for flower if pronounced with high tone

TheWanderer

01:42

Ooh

Sergiy Kolodyazhnyy

Which in Japanese is Hana

WinEunuuchs2Unix

SSO uses your email address (which has my name) on things you post.

TheWanderer

My friend's dad's name is Hui and he greets him on the phone with "Hue Hui"

Sergiy Kolodyazhnyy

Ever seen this symbol ? 花？

TheWanderer

I love Mandarin

@SergiyKolodyazhnyy nop

@SergiyKolodyazhnyy so the name Hannah is flower?

Sergiy Kolodyazhnyy

01:43

That's hua or hana in Japanese

TheWanderer

Oh

Sergiy Kolodyazhnyy

@TheWanderer Hannah might be completely different

TheWanderer

Yeah it's Hebrew for grace

Sergiy Kolodyazhnyy

Anywho . . .I've been smarting enough for tonight. I should go finish watching jack's video and sleep

I basically slept like 2-3 hours at work

TheWanderer

Good job

Literally lol

Sergiy Kolodyazhnyy

01:45

ikr . . . All because i was pissed last night because of my digital circuits 3 exam, and couldn't sleep

TheWanderer

Hue

Sergiy Kolodyazhnyy

@TheWanderer 50 shades of :p

TheWanderer

Lol

50 Hues of Hue

Sergiy Kolodyazhnyy

well played, Zach, well played

TheWanderer

Ikr

WinEunuuchs2Unix

01:48

I know left, basic, cobol and assembler, I hope to learn right next month. (ikr...get it?)

Sergiy Kolodyazhnyy

@WinEunuuchs2Unix best advice : there's 3 languages you should know on any *nix system: Python, Perl, and bash . . . optionally posix-complicant shell scripting, awk, and basic sed maybe

@WinEunuuchs2Unix oooooooh, i get it . . . .

clever, clever . . . .maybe i need another shot ?

WinEunuuchs2Unix

@SergiyKolodyazhnyy I'm sure you are probably right about learning Python and Perl... but my mind is stuck in the gutter to learn Bash and then relearn C within Unix/Linux environment. Of course I have to learn GTK and Gnome too.

Sergiy Kolodyazhnyy

Well, you're doing an OK just learning Bash. Keep it up

Android Dev

@SergiyKolodyazhnyy Yeah. For some reason, after extracting the payload from the cover image, a very small fraction of the bits are zero when they should be 1. See the output from running the program here: paste.ubuntu.com/24291237

About 250 of the like 400,000 to be more precise

@WinEunuuchs2Unix Are you sure you wouldn't rather learn C++ instead?

Instead of C that is

WinEunuuchs2Unix

@AndroidDev I have a million lines of DOS C code I was hoping to port.

Nathan Osman

03:25

What the...

Journeyman Geek

04:07

That's terrible.

Seth

04:24

3

Q: Burning vs Melting - when applied to cooking chocolate

I'm aware melting is simply heat causing molecules to go from solid to liquid, and burning is a chemical reaction, normally with oxygen; but I don't understand how this applies to cooking chocolate. See, when you cook chocolate naked on a pan, the chocolate will burn. However, if you cook a bowl...

thermodynamics states-of-matter combustion

Zanna

@Fabby what's that?

Yum chocolate

Seth

I thought it was a very interesting question myself

Zanna

04:48

When I was a young teen, I used to have sleepovers with my friends, and an essential part of it was melting a large quantity of chocolate in the microwave and dipping marshmallows in it and eating them

Once we burned the chocolate that way. It was so tragic

SmokeDetector

[ SmokeDetector | MS ] Bad keyword in body, bad keyword in title, link at end of body, pattern-matching website in body: Boost Your Testosterone And Slow Down Your Death By Rust by dfsd dfsx on askubuntu.com

Zanna

These days I tell my students to measure the wavelength of the microwaves in the microwave by removing the turntable, putting a large chocolate bar inside, and measuring the distance between the melt zones (the waves are about 12cm long, so melt zones occur every 6cm)

Everything is better with chocolate, especially physics...

3

Zanna

05:06

Someone suggested edit to remove the link which I "improved", but the answer is not needed given the other answers and possibly it's spam revisions

Jacob Vlijm

05:46

@Zanna Same thought I had yesterday, but I was on my tablet and the link didn't work, couldn't check for sure.

Ubuntu Questions on U&L

0

Q: udev not working in ubuntu 16.04 and 14.04

I Am Try to Setting udev rule in /etc/udev/rules.d/5-usb-lab.rules 5-usb-lab.rules Rule is SUBSYSTEM=="tty",ACTION=="add", KERNELS=="3-2:1.0", NAME="ttyUSB99", MODE="0777" . This Rule is Work Well in ubuntu 12.04 32 bit but This Rules Setting Not Working in ubuntu 14.04 32 bit and ubuntu 16.04 3...

ubuntu udev

Zanna

06:31

needs answer or unclear what you're asking?

@JacobVlijm link seems pretty random... I don't know!

grumpy editing

Raghul M

07:22

Hello.. I am working in a project where pendrive need to format itself. For that I tried to use autorun.sh...but its not working

Is there anyother way to do iti?

Jacob Vlijm

07:54

@Zanna Yeah, I think it is one of those "why does my Ubuntu not use the latest version" -kind of questions. askubuntu.com/questions/151283/…

Zanna

hmm maybe

Jacob Vlijm

You don't agree?

Zanna

I think you are most likely right

Nathan Osman

"The recent leaks from Canonical, the company behind the Ubuntu family of distributions, show that the name of the distribution will be "Апельсиновый Арбалет", the Russian for Orange Crossbow."

Lol.

Jacob Vlijm

Th alliteration is lost in translation :)

Nathan Osman

08:10

Oh?

Jacob Vlijm

It is her birthday? Ah, waitwaitwait...

jokerdino

Yeah wait. o.O

Jacob Vlijm

You are bad :)

Nathan Osman

I should have expected this from someone named "jokerdino".

jokerdino

:D

Zanna

08:11

o.O

I missed it

Jacob Vlijm

That creates the idea, let's write totally silly answers today :)

Nathan Osman

He wished you a happy birthday.

@JacobVlijm we already get a few of those.

Like the guy who told another user he could clean his PC with soap and water.

Jacob Vlijm

@NathanOsman ....But he was kidding doesn't sound good :)

@NathanOsman where? wait, not you too?

Nathan Osman

@JacobVlijm it wasn't me.

I think you can find it on Gems somewhere.

Zanna

I remember someone asked me in high school if I knew when the birthday of her crush was, and I told her it was February 31st

she believed me :/

Nathan Osman

08:13

:|

Zanna

I did tell her later that I was pranking...

but still :(

Jacob Vlijm

@Zanna Haha, but: Soap not loaded error even after installing in Ubuntu gets another meaning now: askubuntu.com/questions/887723/…

Zanna

sounds like an error thrown by a "smart" washing machine

@jokerdino how do you know it's NOT my birthday today?

Jacob Vlijm

:)

jokerdino

Maybe we should just pin a Happy birthday message haha.

Jacob Vlijm

08:17

...We should!

Zanna

hahahaha

Jacob Vlijm

Volonteers?

jokerdino

Happy birthday @Zanna! Have fun~

9

Zanna

or better a Happy Unbirthday message - that would be valid almost every day

@jokerdino roflmao you are in big trouble

Jacob Vlijm

Coincidentally, this is not my birthday as well.

Zanna

08:19

that's so strange

jokerdino

Happy birthday @JacobVlijm too~

9

Jacob Vlijm

Haha, to you too @jokerdino

jokerdino

OK, we are setup now.

Just need to chat this transcript away ;)

Jacob Vlijm

Many questions are potentially funny though: Unity Launcher and Top Panel disappeared in 14.04

....Now we only need to find 14.04 to get it back

jokerdino

@JacobVlijm that would be a cruel joke haha.

Weirdly enough, it happens to people all the time.

Jacob Vlijm

08:28

:)

Zanna

@JacobVlijm it is one of those days

Jacob Vlijm

Yeah, it is! @Zanna

Zanna

09:02

oops hammer

didn't notice the tag!

Jacob Vlijm

09:29

Totally OT, askubuntu.com/questions/899105/…

Zanna

09:40

Voted

Jacob Vlijm

Thanks :)

Zanna

Thank you for catching :)

Fabby

@Zanna A silly joke!

@JacobVlijm voted

Jacob Vlijm

Hey Fabby! Thanks :)

Fabby

@Zanna starred!

Zanna

09:55

@Fabby haha thanks :D

jokerdino

@JacobVlijm seems like clever spam.

SmokeDetector

[ SmokeDetector | MS ] URL-only title, bad keyword in body, bad keyword in title, link at end of body, link following arrow in body, +2 more: newmusclesupplements.com/endovex/ by sidneygi on askubuntu.com

Fabby

@jokerdino smart man!!!

Jacob Vlijm

@jokerdino WOW, I even didn't think of it for a second. Sharp!

jokerdino

@Fabby Not getting fooled today ;)

Fabby