Recent Posts

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Distributions / Re: Ubuntu 17.10
« Last Post by fox on Today at 04:03:49 pm »
Ubuntu 17.10 was released today, along with the other desktop flavours.
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Marketplace / Anyone have a set of surplus stereo computer speakers?
« Last Post by ssfc72 on Yesterday at 09:11:18 pm »
My nice, smallish computer speaker system gave out on me.  It was a cheapie set but it had good sound and had a small woofer speaker, as well as the stereo speakers.

So, if anyone has a  a set of surplus computer stereo speakers, that you aren't using, that are in almost like new condition, I would be interested in them.

I cracked open the speaker with the controls and there is a circuit board with 2 IC's and lots of electrolytic capacitors.  It appears the audio signal is not getting passed through the circuit board because I can hear a very soft hum from the speakers, so the speakers are being powered but no audio signal is being received.
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Support / Re: Forced convert to Linux Mint on a high dpi iMac
« Last Post by fox on October 17, 2017, 09:39:51 pm »
Jason, your messages are helpful nevertheless and I will look into the driver issue, though I am happy at the moment with using Mint. Incidentally, the newer display server is Wayland, and it might be relevant on Ubuntu 17.10 since it is the default. But Ubuntu 17.04 was still using Xorg.
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Support / Re: Forced convert to Linux Mint on a high dpi iMac
« Last Post by Jason Wallwork on October 17, 2017, 12:56:03 pm »
It's certainly worth a try since what you're experiencing is definitely related to the driver. It may be that Mint is using an open source Radeon driver whereas 16.10 doesn't see it? Maybe they dropped support for it? System info in either distribution might tell you what driver you're using. Also thinking that Mint probably is still using X.org while the much newer Ubuntu 17.10 is probably using the newer display server (can't recall the name of it right now). So they very likely have at least a slightly different list of available drivers. But honestly, I haven't had to get into video idriver nards in a long time to fix anything but you might have to get optimal performance in Linux. Wish I could help more but I'm out of my league here :)
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Support / Re: Forced convert to Linux Mint on a high dpi iMac
« Last Post by fox on October 17, 2017, 11:49:13 am »
More progress. I tried a bunch of acpi settings, and besides acpi=off, two other settings work in combination with nomodeset, though they still result in window effects. The two are:
Code: [Select]
acpi=noapic nomodeset
Code: [Select]
acpi=noapic acpi_backlight=vendor nomodeset
I tried both with a Ubuntu 17.04 installation on an SSD run externally. In both cases, boot-up was fast. In the first case, window movement was slow; you could see the delay effects when dragging or expanding a window. In the second case, window movement wasn't slow, but the animation when moving windows was lost. In other words, when you move or expand a window, you see only an outline until the action ceases; then the change shows instantly. But also in the second case, I lose the ability to change the screen brightness through "settings"; the setting to do so in "brightness and lock" is gone. I suspect that the missing brightness setting can be fixed with software. But I don't know the cure for the lose of real time window dragging effects. This is not a big deal, however, so I now have the possibility of installing Ubuntu on my 5k iMac. But since everything seems to be working in Mint, I'm probably going to stick with it now and continue to see how I can fix the window dragging in Ubuntu. Perhaps by installing the proprietary Radeon video card, as suggested by Jason?
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Meetings / Re: Move PLUG MUGs to Thursdays at Whistle Stop Cafe?
« Last Post by Jason Wallwork on October 17, 2017, 10:21:20 am »
Bob should probably make a decision on this soon. I'm chatting with him on Thursday so I'll bring it up again then.
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Meetings / PLUG MUG: Monday, October 23, 2017: Sign-up list
« Last Post by Jason Wallwork on October 17, 2017, 10:18:56 am »
Each MONDAY evening, except the first Monday of the month, beginning at about 7 pm, everyone is welcome to hang out with other PLUGgers at Tim Horton's Coffee & Donuts on Monaghan Road just north of Lansdowne Street. We call these nights PLUG MUGs. There is free wireless internet and no agenda; just friends hanging out and talking about everything from Linux to X-rays.

If you're planning on attending this MUG, please POST BELOW. It helps people coming from out of town to know if anybody is coming. By the way, you don't have to be there right at 7 pm, that's just a suggested time. We fully expect people to show up at different times. If you're not coming at 7-8 pm though, let us know roughly when you're coming so we can wait for you.

Synchronize your watches!! <^8# See you there!
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Security / Re: Severe flaw in WPA2
« Last Post by Jason Wallwork on October 17, 2017, 08:26:15 am »
1 Minimal: No impact on the system or other applications.
2 Normal: Default level. Usually low impact on the system.

This would definitely have would have an impact on the system, at least potentially. Remember levels aren't priority levels. They're impact levels. It's also new, so they probably don't know if it will have unforeseen impacts yet.
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Support / Re: Forced convert to Linux Mint on a high dpi iMac
« Last Post by fox on October 16, 2017, 06:56:10 pm »
I've made a bit of progress in getting Ubuntu to boot on my 5k iMac. Using Ubuntu 16.04, I can get it to boot right up when I use the grub parameters acpi=off and nomodeset. These parameters were actually recommended in one posting, but another suggested that nointremap would also boot and have none of the negative effects of acpi=off, so I hadn't tried that before. Unfortunately, while it does boot right up, window response is noticeably slow with these parameters; e.g., moving or expanding windows. Not something that I would be happy with. But at least I know now that a/the major reason for problems booting Ubuntu installers on the 5k iMac relates to acpi. I did try a few other alternative acpi options, but none except turning it off worked. But I don't really get why an acpi setting should relate to a 5k display, unless the problem is more the video card than the display. I wonder if I installed Ubuntu with the acpi=off setting and then added the proprietary Radeon driver if this would solve things. But what is Mint doing that's different because it works fine without the Radeon driver installed?

Speaking of Mint, dropping the default resolution to 2560x1440 does wonders for some of the windows. That's only half the resolution this iMac is capable of, but it's still darn good and I didn't buy that model specifically because of the 5k resolution. Maybe future distros will have kernels with native 5k capability.
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Security / Re: Severe flaw in WPA2
« Last Post by ssfc72 on October 16, 2017, 06:52:49 pm »
My Mint 18 distro just issued a WPA update, today. Oddly, it was only a level 2 update?
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