IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 1 October 2018 (all times are UTC)
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| 07:35 | <Hyperbyte> alkisg, do you know of any tweaks/trics I can try to perform to speed up thin clients that are slow with full-screen things, like switching applications?
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| 07:35 | <alkisg> Hi Hyperbyte
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| 07:36 | I haven't worked with thin clients for a long time now :)
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| 07:36 | Switching applications is slow? How so?
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| 07:37 | <Hyperbyte> alt+tab
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| 07:37 | If I do that, it takes a second or so to switch
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| 07:37 | <alkisg> No I mean, is it slow on the server too, or is it about the remote part that makes it slow?
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| 07:37 | Because I doubt that screen transfering would need 1 sec
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| 07:44 | <Hyperbyte> I have no idea. I have no screen attached to the server nor GUI or something. It's in a datacenter.
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| 07:45 | <alkisg> Hyperbyte: what desktop environment is that?
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| 07:45 | <Hyperbyte> I can tell you Chromium is killing the CPU
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| 07:45 | MATE.
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| 07:45 | <alkisg> Try with 2 xterms open and nothing else
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| 07:46 | So that there's no cpu/ram overhead involved
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| 07:46 | If it happens there too, then it might be a xorg/networking issue
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| 07:46 | <Hyperbyte> That would be a good experiment
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| 07:47 | I have X_COLOR_DEPTH=16 and LDM_DIRECTX=True in lts.conf, that's about all the optimizations I can think of.
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| 07:47 | <alkisg> 1 sec doesn't sound related to xorg/network
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| 07:48 | You have full gigabit, don't you?
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| 07:48 | <Hyperbyte> Yeah, fiber.
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| 07:48 | <alkisg> Fiber to the clients? That sounds weird
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| 07:48 | <Hyperbyte> Well clients are connected via cat cables, but fiber to the server.
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| 07:48 | <alkisg> k
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| 07:48 | <Hyperbyte> It should all be gigabit.
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| 07:49 | <alkisg> And client resolution = 1920x1080?
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| 07:49 | <Hyperbyte> Yeah should be, on at least a few of them (they all have different screens)
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| 07:49 | I think my main problem is web browsers killing the CPU. :-(
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| 07:57 | <alkisg> True, that's where fat clients are useful :)
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| 07:58 | <Hyperbyte> Yeah but at this location I don't have the hardware for it.
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| 07:59 | <alkisg> You can't force miracles... thins = slow, they'll have to live with that
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| 08:00 | <Hyperbyte> That's what I told them, but I was thinking maybe I can find some tweak or tric I didn't know yet.
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| 08:02 | Clients are 1.6ghz Intel Atoms with 1 GB RAM. That's not good enough to meet their web browsing needs.
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| 08:06 | I'd love to run some applications on the clients as localapps, but since almost everything is browser based nowadays...
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| 08:12 | <alkisg> Yeah if a client can run a browser, it deserves to be fat, if not, there's usually not much point in using localapps anyway
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| 08:12 | That's why in ltsp6 we're not planning to support thins, localapps, ltspfs, ldm, etc etc
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| 08:13 | <highvoltage> ltsp6 ♥ :)
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| 08:13 | <alkisg> :D
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| 08:13 | A use case where localapps are useful is e.g. tuxpaint in pentium 4's
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| 08:13 | Those can't run a browser but they can run tuxpaint etc
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| 08:13 | In a few years when most of the edu apps will be html5, that will be again a moot point
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| 08:40 | <Hyperbyte> Yeah, the whole webapps/html5 movement is great, but quite a disaster for thin clients. :-)
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| 08:45 | <highvoltage> I think javascript is a much bigger issue.
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| 08:48 | <alkisg> On the plus side, html5 means we can have lots of apps in linux; while with .exe we don't
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| 08:52 | <Hyperbyte> alkisg, that's true... like I said, it's great. :-)
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| 08:53 | Just means we have to abandon our thin clients. Which also makes sense, because our phones are faster than our thin clients.
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| 14:19 | <mwalters> Hyperbyte: we do localapps w/ chrome... still have some atoms, some dinky celerons. Seems to work OK for most users
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| 14:20 | (thin clients doing localapps chrome)
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| 14:21 | running into issues with chrome right now, though, that I haven't been able to pin down
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| 14:21 | latest gmail update has really put a hurt on them too
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| 14:21 | <alkisg> Still on 14.04?
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| 14:21 | <mwalters> :D yup
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| 14:21 | <alkisg> :)
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| 14:22 | <mwalters> Really have no idea what's going on, even downgraded chrome to the august release and it's still blowing up
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| 14:22 | solution right now is "Use firefox" ;)
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| 14:44 | alkisg: thinking about blowing away our chroot as a sanity check. Anything beyond deleting my current chroot and rerunning ltsp-build-client?
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| 14:44 | Looks like http://wiki.ltsp.org/wiki/Configuration#ltsp-build-client.conf is for a newer version... I can't find lts-build-client.conf ;)
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| 14:44 | or lts-server.conf for that matter
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| 14:48 | <alkisg> You need to create it
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| 14:48 | There's no lts-server.conf anywhere
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| 14:48 | <mwalters> oic
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| 14:49 | Guessing I just need to follow "Installing LTSP in "chroot" mode
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| 14:54 | <alkisg> !install
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| 14:54 | <ltsp> install: http://wiki.ltsp.org/wiki/Installation/Ubuntu for Ubuntu, or http://wiki.ltsp.org/wiki/Installation for other distributions
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| 14:55 | <alkisg> mwalters: this is the best tutorial, not sure if it applies 100% in older versions
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| 15:12 | <mwalters> Thanks
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| 15:12 | Yeah, there was some other steps my boss mentioned, moving sources list etc
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