On Mon, 2018-03-26 at 21:47 -0400, John Stoffel wrote:
> Adafruit.com has some stuff like this for sale. They're not always
> the cheapest, but they have great tutorials and example code.
Found a LWN article on NFC:
https://lwn.net/Articles/645843/
He used a "PN532 NFC/RFID controller breakout board" and "FTDI Serial
TTL-232 USB Cable" to connect via USB. It is supported by libnfc.
His article talks about the Linux NFC being a better design and the
future of NFC for linux. I haven't looked to see if it has progressed
enough since his article to replace libnfc.
> Looks like a good start. Probably cost you about $50 total to get
> started, if you dont' have a raspberry Pi kicking around.
(Still haven't got a raspberry Pi. I consider myself a software guy and
not as interested in "raw" hardware. I got the PocketCHIP from
kickstarter because it was a finished product. However I seem to be
descending into hardware. I purchased TinyCircuit's TinyScreen Video
Game Kit and they sent me a TinyArcade to port my Pac-Man clone to.)
> This could be a really fun thing for the cubs to do! Especially if
> you could then sign their figures so that when they hit the reader,
> it knows it's them. Or something like that. Ask the kids for ideas!
Definitely plan to ask the kids for ideas. Just plan to test enough
that I feel confident it is doable before asking them. Yesterday I took
pictures of Skylanders to see at what scale they still look good. At 64
pixels wide they are a little grainy. 128 pixels wide looks pretty
good. Skylanders apparently has catch phrases for characters so I would
like to get each kid to record a catch phrase for their character.
Dennis> Does anyone have a recommendation for a RFID reader/writer for
Dennis> Linux (and Windows if possible)? I'm looking for a relatively
Dennis> inexpensive solution.
Adafruit.com has some stuff like this for sale. They're not always
the cheapest, but they have great tutorials and example code.
https://learn.adafruit.com/adafruit-nfc-rfid-on-raspberry-pi/overview?gclid…
Looks like a good start. Probably cost you about $50 total to get
started, if you dont' have a raspberry Pi kicking around.
Dennis> My kids just got Skylanders Imaginators. I found some code to
Dennis> read the characters. I started thinking about the Game Design
Dennis> merit badge for Cub Scout Webelos. I'm wondering about the
Dennis> viability of building a "portal" device and having the kids
Dennis> make clay figures with rfids inside the base. Obviously the
Dennis> game would be as complex as Skylanders. I'm thinking 2D using
Dennis> pictures of the models.
This could be a really fun thing for the cubs to do! Especially if
you could then sign their figures so that when they hit the reader, it
knows it's them. Or something like that. Ask the kids for ideas!
Does anyone have a recommendation for a RFID reader/writer for Linux
(and Windows if possible)? I'm looking for a relatively inexpensive
solution.
My kids just got Skylanders Imaginators. I found some code to read the
characters. I started thinking about the Game Design merit badge for
Cub Scout Webelos. I'm wondering about the viability of building a
"portal" device and having the kids make clay figures with rfids inside
the base. Obviously the game would be as complex as Skylanders. I'm
thinking 2D using pictures of the models.
I'll try that Xorg.wrap work-around, in any case.
On Sun, Mar 25, 2018 at 9:26 PM, Krichevsky, Nicholas Jacob <
njkrichevsky(a)wpi.edu> wrote:
> o_O I don't know enough about how X interacts with the hardware, but not
> being able to open the frame buffer doesn't sound good... Take a look at
> this. <https://unix.stackexchange.com/a/149987/233297>
>
I'm pretty sure it does manage to open the framebuffer; I get the mouse
cursor at what looks to be the monitor's native resolution. It probably
throws that error before it tries a different method, but obviously I don't
know.
On Sun, Mar 25, 2018 at 9:26 PM, Krichevsky, Nicholas Jacob <
njkrichevsky(a)wpi.edu> wrote:
> o_O I don't know enough about how X interacts with the hardware, but not
> being able to open the frame buffer doesn't sound good... Take a look at
> this. <https://unix.stackexchange.com/a/149987/233297>
> ------------------------------
> *From:* wlug-bounces(a)mail.wlug.org <wlug-bounces(a)mail.wlug.org> on behalf
> of Richard Klein <rich(a)richardklein.org>
> *Sent:* Sunday, March 25, 2018 7:14:35 PM
> *To:* Worcester Linux Users Group
> *Subject:* Re: [Wlug] Kali Linux/GDM3 display manager
>
> Creating a new user didn't clear anything up. I was able to log into the
> GUI session with the new user, but, again, there was nothing there but a
> solid background and the mouse cursor.
>
> I didn't find .xsession-errors or .gconf in my home directories (for my
> existing account nor for the new account), but I did find
> $home/.local/share/xorg/Xorg.1.log. There were a couple warnings for
> fonts it couldn't find and drivers it couldn't use, but in all cases it was
> able to fall back to something else. There was one error:
> (EE) open /dev/fb0: permission denied
> That was it.
>
> --
> Rich
>
> On Tue, Mar 20, 2018 at 8:45 AM, Bradley Noyes <bkn(a)ithryn.net> wrote:
>
> Richard,
>
> I’d bet that your packages are fine (but i’m not a betting man). It sounds
> too me like there is something awry w/ your X environment. Perhaps the
> upgraded packages don’t recognize a config buried somewhere. Here’s a
> couple things i would try.
>
> - Often times there a file in your home directory called
> .xsession-errors. I’d see if that file exists, and it may offer you some
> hints as to why your window manager is not starting. I recall launching X
> from a Graphical Login Window to be finicky in linux and error output is
> difficult to understand. the .xsession-errors file is where i’d look first.
>
> - Other idea is to create a new user, then login to the GUI with that
> user to make sure the GUI starts from a fresh environment.
>
> - The last idea i have. It sounds like you’re running gnome from the fact
> that your using GDM3, I believe the gnome environment files are in .gconf
> in your home directory. try renaming your .gconf to something like
> .gconf.backup. You may also want to try the same for .local, although many
> other applications beyond gnome apps use .local for environment settings.
>
>
> - b
>
>
> > On Mar 18, 2018, at 11:13, Richard Klein <rich(a)richardklein.org> wrote:
> >
> > I'm running Kali, which is based on Debian. Recently, after some
> updates, the computer would only boot to a text prompt; no GUI. I found
> that, somehow, I had a more recent version of a Gstreamer-plugins library
> than GDM3 could run on. I removed the library, then re-installed GDM3,
> letting it choose whatever libraries it depended on. That worked, to a
> point. It boots to the GUI now, and gives me a login prompt. I enter my
> username and password successfully, but then I get a solid-color
> background, a mouse cursor, and nothing else; no icons, no status bars, no
> menus, no apparent response to mouse clicks.
> >
> > My guess is I still need to re-install something else that runs on top
> of the display manager, but I don't know what. Any ideas?
> > _______________________________________________
> > Wlug mailing list
> > Wlug(a)mail.wlug.org
> > http://mail.wlug.org/mailman/listinfo/wlug
>
>
> _______________________________________________
> Wlug mailing list
> Wlug(a)mail.wlug.org
> http://mail.wlug.org/mailman/listinfo/wlug
>
>
>
> _______________________________________________
> Wlug mailing list
> Wlug(a)mail.wlug.org
> http://mail.wlug.org/mailman/listinfo/wlug
>
>
o_O I don't know enough about how X interacts with the hardware, but not being able to open the frame buffer doesn't sound good... Take a look at this.<https://unix.stackexchange.com/a/149987/233297>
________________________________
From: wlug-bounces(a)mail.wlug.org <wlug-bounces(a)mail.wlug.org> on behalf of Richard Klein <rich(a)richardklein.org>
Sent: Sunday, March 25, 2018 7:14:35 PM
To: Worcester Linux Users Group
Subject: Re: [Wlug] Kali Linux/GDM3 display manager
Creating a new user didn't clear anything up. I was able to log into the GUI session with the new user, but, again, there was nothing there but a solid background and the mouse cursor.
I didn't find .xsession-errors or .gconf in my home directories (for my existing account nor for the new account), but I did find $home/.local/share/xorg/Xorg.1.log. There were a couple warnings for fonts it couldn't find and drivers it couldn't use, but in all cases it was able to fall back to something else. There was one error:
(EE) open /dev/fb0: permission denied
That was it.
--
Rich
On Tue, Mar 20, 2018 at 8:45 AM, Bradley Noyes <bkn(a)ithryn.net<mailto:bkn@ithryn.net>> wrote:
Richard,
I’d bet that your packages are fine (but i’m not a betting man). It sounds too me like there is something awry w/ your X environment. Perhaps the upgraded packages don’t recognize a config buried somewhere. Here’s a couple things i would try.
- Often times there a file in your home directory called .xsession-errors. I’d see if that file exists, and it may offer you some hints as to why your window manager is not starting. I recall launching X from a Graphical Login Window to be finicky in linux and error output is difficult to understand. the .xsession-errors file is where i’d look first.
- Other idea is to create a new user, then login to the GUI with that user to make sure the GUI starts from a fresh environment.
- The last idea i have. It sounds like you’re running gnome from the fact that your using GDM3, I believe the gnome environment files are in .gconf in your home directory. try renaming your .gconf to something like .gconf.backup. You may also want to try the same for .local, although many other applications beyond gnome apps use .local for environment settings.
- b
> On Mar 18, 2018, at 11:13, Richard Klein <rich(a)richardklein.org<mailto:rich@richardklein.org>> wrote:
>
> I'm running Kali, which is based on Debian. Recently, after some updates, the computer would only boot to a text prompt; no GUI. I found that, somehow, I had a more recent version of a Gstreamer-plugins library than GDM3 could run on. I removed the library, then re-installed GDM3, letting it choose whatever libraries it depended on. That worked, to a point. It boots to the GUI now, and gives me a login prompt. I enter my username and password successfully, but then I get a solid-color background, a mouse cursor, and nothing else; no icons, no status bars, no menus, no apparent response to mouse clicks.
>
> My guess is I still need to re-install something else that runs on top of the display manager, but I don't know what. Any ideas?
> _______________________________________________
> Wlug mailing list
> Wlug(a)mail.wlug.org<mailto:Wlug@mail.wlug.org>
> http://mail.wlug.org/mailman/listinfo/wlug
_______________________________________________
Wlug mailing list
Wlug(a)mail.wlug.org<mailto:Wlug@mail.wlug.org>
http://mail.wlug.org/mailman/listinfo/wlug
Creating a new user didn't clear anything up. I was able to log into the
GUI session with the new user, but, again, there was nothing there but a
solid background and the mouse cursor.
I didn't find .xsession-errors or .gconf in my home directories (for my
existing account nor for the new account), but I did find
$home/.local/share/xorg/Xorg.1.log. There were a couple warnings for fonts
it couldn't find and drivers it couldn't use, but in all cases it was able
to fall back to something else. There was one error:
(EE) open /dev/fb0: permission denied
That was it.
--
Rich
On Tue, Mar 20, 2018 at 8:45 AM, Bradley Noyes <bkn(a)ithryn.net> wrote:
> Richard,
>
> I’d bet that your packages are fine (but i’m not a betting man). It sounds
> too me like there is something awry w/ your X environment. Perhaps the
> upgraded packages don’t recognize a config buried somewhere. Here’s a
> couple things i would try.
>
> - Often times there a file in your home directory called
> .xsession-errors. I’d see if that file exists, and it may offer you some
> hints as to why your window manager is not starting. I recall launching X
> from a Graphical Login Window to be finicky in linux and error output is
> difficult to understand. the .xsession-errors file is where i’d look first.
>
> - Other idea is to create a new user, then login to the GUI with that
> user to make sure the GUI starts from a fresh environment.
>
> - The last idea i have. It sounds like you’re running gnome from the fact
> that your using GDM3, I believe the gnome environment files are in .gconf
> in your home directory. try renaming your .gconf to something like
> .gconf.backup. You may also want to try the same for .local, although many
> other applications beyond gnome apps use .local for environment settings.
>
>
> - b
>
>
> > On Mar 18, 2018, at 11:13, Richard Klein <rich(a)richardklein.org> wrote:
> >
> > I'm running Kali, which is based on Debian. Recently, after some
> updates, the computer would only boot to a text prompt; no GUI. I found
> that, somehow, I had a more recent version of a Gstreamer-plugins library
> than GDM3 could run on. I removed the library, then re-installed GDM3,
> letting it choose whatever libraries it depended on. That worked, to a
> point. It boots to the GUI now, and gives me a login prompt. I enter my
> username and password successfully, but then I get a solid-color
> background, a mouse cursor, and nothing else; no icons, no status bars, no
> menus, no apparent response to mouse clicks.
> >
> > My guess is I still need to re-install something else that runs on top
> of the display manager, but I don't know what. Any ideas?
> > _______________________________________________
> > Wlug mailing list
> > Wlug(a)mail.wlug.org
> > http://mail.wlug.org/mailman/listinfo/wlug
>
>
> _______________________________________________
> Wlug mailing list
> Wlug(a)mail.wlug.org
> http://mail.wlug.org/mailman/listinfo/wlug
>
Thanks! I'm not sure I'll do anything with it before the weekend, but I'll
check this out.
On Tue, Mar 20, 2018 at 8:45 AM, Bradley Noyes <bkn(a)ithryn.net> wrote:
> Richard,
>
> I’d bet that your packages are fine (but i’m not a betting man). It sounds
> too me like there is something awry w/ your X environment. Perhaps the
> upgraded packages don’t recognize a config buried somewhere. Here’s a
> couple things i would try.
>
> - Often times there a file in your home directory called
> .xsession-errors. I’d see if that file exists, and it may offer you some
> hints as to why your window manager is not starting. I recall launching X
> from a Graphical Login Window to be finicky in linux and error output is
> difficult to understand. the .xsession-errors file is where i’d look first.
>
> - Other idea is to create a new user, then login to the GUI with that
> user to make sure the GUI starts from a fresh environment.
>
> - The last idea i have. It sounds like you’re running gnome from the fact
> that your using GDM3, I believe the gnome environment files are in .gconf
> in your home directory. try renaming your .gconf to something like
> .gconf.backup. You may also want to try the same for .local, although many
> other applications beyond gnome apps use .local for environment settings.
>
>
> - b
>
>
> > On Mar 18, 2018, at 11:13, Richard Klein <rich(a)richardklein.org> wrote:
> >
> > I'm running Kali, which is based on Debian. Recently, after some
> updates, the computer would only boot to a text prompt; no GUI. I found
> that, somehow, I had a more recent version of a Gstreamer-plugins library
> than GDM3 could run on. I removed the library, then re-installed GDM3,
> letting it choose whatever libraries it depended on. That worked, to a
> point. It boots to the GUI now, and gives me a login prompt. I enter my
> username and password successfully, but then I get a solid-color
> background, a mouse cursor, and nothing else; no icons, no status bars, no
> menus, no apparent response to mouse clicks.
> >
> > My guess is I still need to re-install something else that runs on top
> of the display manager, but I don't know what. Any ideas?
> > _______________________________________________
> > Wlug mailing list
> > Wlug(a)mail.wlug.org
> > http://mail.wlug.org/mailman/listinfo/wlug
>
>
> _______________________________________________
> Wlug mailing list
> Wlug(a)mail.wlug.org
> http://mail.wlug.org/mailman/listinfo/wlug
>
Richard,
I’d bet that your packages are fine (but i’m not a betting man). It sounds too me like there is something awry w/ your X environment. Perhaps the upgraded packages don’t recognize a config buried somewhere. Here’s a couple things i would try.
- Often times there a file in your home directory called .xsession-errors. I’d see if that file exists, and it may offer you some hints as to why your window manager is not starting. I recall launching X from a Graphical Login Window to be finicky in linux and error output is difficult to understand. the .xsession-errors file is where i’d look first.
- Other idea is to create a new user, then login to the GUI with that user to make sure the GUI starts from a fresh environment.
- The last idea i have. It sounds like you’re running gnome from the fact that your using GDM3, I believe the gnome environment files are in .gconf in your home directory. try renaming your .gconf to something like .gconf.backup. You may also want to try the same for .local, although many other applications beyond gnome apps use .local for environment settings.
- b
> On Mar 18, 2018, at 11:13, Richard Klein <rich(a)richardklein.org> wrote:
>
> I'm running Kali, which is based on Debian. Recently, after some updates, the computer would only boot to a text prompt; no GUI. I found that, somehow, I had a more recent version of a Gstreamer-plugins library than GDM3 could run on. I removed the library, then re-installed GDM3, letting it choose whatever libraries it depended on. That worked, to a point. It boots to the GUI now, and gives me a login prompt. I enter my username and password successfully, but then I get a solid-color background, a mouse cursor, and nothing else; no icons, no status bars, no menus, no apparent response to mouse clicks.
>
> My guess is I still need to re-install something else that runs on top of the display manager, but I don't know what. Any ideas?
> _______________________________________________
> Wlug mailing list
> Wlug(a)mail.wlug.org
> http://mail.wlug.org/mailman/listinfo/wlug
Before i reinstalled GDM3, bash wasn't even recognizing startx as a valid
command. I haven't tried again since reinstalling GDM3. Maybe I'll try
that after i finish in the kitchen.
On Sun, Mar 18, 2018, 3:54 PM Krichevsky, Nicholas Jacob <
njkrichevsky(a)wpi.edu> wrote:
> Shot in the dark - what happens if you disable gdm, then use a tty to
> start X yourself, effectively bypassing gdm?
> ------------------------------
> *From:* wlug-bounces(a)mail.wlug.org <wlug-bounces(a)mail.wlug.org> on behalf
> of Richard Klein <rich(a)richardklein.org>
> *Sent:* Sunday, March 18, 2018 11:13:30 AM
> *To:* Worcester Linux Users Group
> *Subject:* [Wlug] Kali Linux/GDM3 display manager
>
> I'm running Kali, which is based on Debian. Recently, after some updates,
> the computer would only boot to a text prompt; no GUI. I found that,
> somehow, I had a more recent version of a Gstreamer-plugins library than
> GDM3 could run on. I removed the library, then re-installed GDM3, letting
> it choose whatever libraries it depended on. That worked, to a point. It
> boots to the GUI now, and gives me a login prompt. I enter my username and
> password successfully, but then I get a solid-color background, a mouse
> cursor, and nothing else; no icons, no status bars, no menus, no apparent
> response to mouse clicks.
>
> My guess is I still need to re-install something else that runs on top of
> the display manager, but I don't know what. Any ideas?
> _______________________________________________
> Wlug mailing list
> Wlug(a)mail.wlug.org
> http://mail.wlug.org/mailman/listinfo/wlug
>
