Hi guys, I'm thinking about getting two of these for the sole purpose of showing scrolling text in chrome from a webpage The raspberry pi's i'm using at the moment are just not powerful enough and the text is scrolling really slow Any recommendations? Something that is already available
The fault isn't with the Pi, it's with the execution of the task. What is it that you want to achieve? You just want scrolling text to appear on your screen? You don't need Chrome to do that. If the source must be some web page, then there are other browsers that run much faster on the Pi than Chrome.
I'm guessing the it's for a display and that the web page doesn't show properly in anything but Chrome. You could have a look at the various Android offerings.
Thanks for your replies, yeah I've decided chrome because it was easy to set up as kiosk, Pi boots runs chrome full screen. I remember trying every single one I could get my hands on, Midori being one o them. All make the processor run at 100% Someone at another forum posted that the GPU runs in software in DE.
How about pre-rendering the website (whole site, not just a single screenful - example here) and save as an image, then show/scroll that on the Pi?
Remove the GUI, install only the pakages required for your browser (and maybe not chrome) and start X with only your browser (lots of other crap isnt there and only your browser) Maybe remove other running programs aswell that you dont need, like services(whatever apache or Samba) and deamons(Network/Camera/Video) Dint do alott in Raspi lately but im sure the Rapsi is capable of alott, just dont run shit beside it. I need the Camera to stream video to a PC and recieve commands and drive a robot car under himself... Almost done setting up, I have to remove things like the complet gui stuff and X because I dont need it, free up cpu and gpu (You probebly still need Gnome and X, but not all other tools)
Thanks for the suggestions. I tried overclocking, 900mhz is stable but still slow, the content changes daily so I need the browser to pick up the changes which chrome is doing
'cron' to the rescue... Btw, if you absolutely want to stick to a browser-based solution: Wayland is much faster on the Pi than X11 due to it using hardware acceleration. I don't know which browsers work with Wayland though, but that might be worth looking into - if the bottleneck is in fact the drawing, not the rendering.
If you wanna invest some time in learning a programming language in this project, Python would be ideal for fetching the data online and display it however you want. A bash script could do it too. You do a simple script that fetch and display once, then use cron to execute it periodically.
Well....if you want a low power arm based device like RPi but with a bit more power I'd recommend the odroid-u3 http://hardkernel.com/main/products/prdt_info.php I find it hard to come up with a use for my RPi except for some very minimal things... irc, kaid and dial-in is pretty much all mine is doing right now :|
I first got into Pi's when I became an apprentice, part of what got the job was my [then minimal] interest in Linux, and my boss was looking into getting an NTP server to fix the time issue he was having. Time was floating off in Windows and the domain controller needed rebooting every weekend to rectify it, and the professional solutions we were quoted for were huge [rackmount, and in the $$$'s] and did more than we needed. I obtained a Pi, debloated it [that project, especially Raspbian really got derailed by "investors" and has way too much BS pre-packaged.] and installed the NTP service, the point,ed our servers to look at it for time. This is a a stratum 2 NTP Relay server and relies upon requesting the time from another NTP server out in the world. The expensive ones are typically Stratum 1 and have all kinds of fancy GPS related stuff that we really didn't need. Granted eventually all the NTP servers we're pooling will go offline eventually, but all you do is putty into it, "shutdown -r now" and it will reboot, come back up and get the time again. My next project was one Familyguy helped me out on and he made a script that runs a command [to check a usb temperature sensor], check the result and e-Mail it if it exceeds a threshold. We have two of these, we intend to get another and again this was a case of professional solutions being gigantic and overkill. We were quoted £400 for an APC rack mount solution with a single sensor! I also want a Pi to make a security camera for my personal property!
The raspberry pi isn't all that great for using as a normal PC, but for single-purpose use or headless stuff it's really GREAT! I use one along with a 2-bays raid enclosure as a home server. - FTP/SSH/NFS shares of the disks partitions - A safe gateway to my home network from the internet - Torrent client with web UI. This mean I can fetch any of my files and manage my downloads from anywhere. And when I'm home I can access my files just as if it was a local hdd (via NFS), including playing FullHD movies with vlc; seamless streaming. I also got a second one running Xbian (a xbmc/debian distro), that source its multimedia files from the first one and allows for watching movies/series with ease. It's even controllable with the TV remote via HDMI-CEC. The pi is well optimized to play h264 videos and playback is smooth even for 1080p as long a the sd-card is fast. Class10 works well, class4 doesn't (I think it has to do with caching). Those little beast are not number-crunching monsters, but they are low-power resilient little boxes that can do light to middle weight stuff all day everyday and cost you next to nothing in electricity at the end of the year.
Cyanist the major problem with using the Pi as an NTP server is that it doesn't have an onboard RTC, so as soon as the power goes it forgets the time, if it can't reach an NYP server it can't set the time. You may as well point them straight at a public NTP server.
Guys thanks very much again for all your input, appreciated as always. I really want to try Weston and see how that goes, or actually learn how cron works. Out of curiousity, are you running rutorrent or what? Python sounds like something I should invest my time in but already messing with ad integration in linux and a bit of mysql I was looking at odroid but ended up getting udoo quad. Still Pi is a wonderful device and I wish I had more time to play with it
For torrents I'm running a modified version of "deluge". Python is definitely worth learning for any computer hobbyist. Good luck with your projects!
The good thing about the raspberry pi is the versatility, I do wish it was ever so slightly more powerful, just enough to cope with web browsing, but as other have said, if you want it to work exactly how you want it you have the flexibility to tweak stuff, I suggest having a look around if anyone already has any projects similar to what you where wanting to achieve that you could try adapting to your own personal needs, it seems someone somewhere has already done pretty much everything you could expect and they are usually written up instructions on how they did it