Chrome Browser, Mac OS and LaTeX

Oh dear, something's awry with the interaction of LaTeX with the Chrome browser. The latter is not rendering variables in italics as it should. Figure 1 shows a screenshot of part of a post I made to my Mathematics blog. It was taken using the Safari browser and everthing looks fine.

Figure 1

Here's the same screenshot but this time taken within the Chrome browser.

Figure 2

It's not a major issue and everything else still works fine but it's a little annoying as I much prefer the italicised rendering of variables. It only has to do with Chrome on a device running the Mac operating system. The variables display properly on Chrome running on my Raspberry Pi 400 and even on Chrome running on iOS. Hopefully future updates will address this issue.

Elementary OS: Initial Impressions

Given that I've just recently install Elementary OS on my 2023 Macbook Pro (see previous post), it seems appropriate to make some initial observations about its functionality. The OS doesn't come with much software installed and my first order of business was to download the Chrome browser which is my browser of choice and upon which I am heavily reliant. That proved relatively painless thanks to Google's clear instructions. The OS has a so-called App Centre but Chrome was not listed there and so was of no help whatsoever.

The App Centre Software Categories

Next I installed my ExpressVPN and once again that was easy enough thanks to their very helpful website. No help of course from the App Centre but typing "torrents" into the search bar of the same brought up Gabut Download Manager that supposedly handles torrent files and I needed that. Happily, the app works fine when I downloaded a test ebook but that's when the awful realisation downed on me that I'd erased my Calibre library of ebooks. For some reason it didn't cross my mind and given that the laptop wouldn't reboot, the library was probably lost anyway. 

Opps! I forgot to keep my eLibrary backed up

I do have a backup of the library but my last back up was quite some time ago so many books have been lost. I got out of the habit of backing up regularly and have paid the price. The library is too large to back up online. Calibre is not listed at the App Centre but I happened to notice a small link that leads to Flathub and a message that apps can be side-loaded from that source. The download was successful. I also noticed that Chrome and a great many other apps are available on Flathub so that's probably the best place to retrieve apps from. 

The native video player opened an AVI file that I'd downloaded but played only audio with no video. However, VLC from Flathub came to the rescue and I had video as well as audio!

Raspberry Pi 400 (2020) versus MacBook Pro (Retina 13" late 2013)

I have two computing devices with keyboards: one is a Raspberry Pi 400 released in 2000 and which I bought in April of 2022; the other is laptop, my MacBook Pro, released in late 2013 and which I purchased in August of 2014.

The specifications are as follows:

MacBook Pro Retina 13" with 2560-by-1600 resolution at 227 pixels per inch and 2.4GHz dual-core Intel Core i5 processor (Turbo Boost up to 2.9GHz) with 3MB shared L3 cache. It has a 256GB SSD and 8GB of 1600MHz DDR3L onboard memory. The Intel Iris Graphics support dual display and video mirroring, simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on up to two external displays, both at millions of colors. There is a 720p FaceTime HD camera.

The Raspberry Pi 400 contains the same general specifications as the Raspberry Pi 4 but is tweaked for this new form factor. Thanks to work on the device’s thermal performance, the processor on Pi 400 has an increased clock speed over the base Pi 4. As a result, the Pi 400 has an increased clock rate from 1.5 GHz to 1.8 GHz. Meaning you should get slightly better performance when using this device. Unlike the Pi 4, there is only one variant of the Raspberry Pi 400. You can only get 4GB of memory with this device. Another change with this device is that it only has three USB ports. One is a USB 2.0 port, and the other two are USB 3.0 ports. The rest of the specifications of the device remains the same as the Raspberry Pi 4. You have access to the same GPIO pins, gigabit ethernet, Wi-Fi, and Bluetooth as the base device.

It's probably not fair to compare the two devices but, as I use each of them daily, I will. In its day, the MacBook Pro was a premium device and it still holds it own. I've installed Linux Mint, replacing the Mac OS, and am quite satisfied with its performance. Mind you, I don't demand much of it nowadays. At most I'd have twenty tabs open in Google Chrome at any one time, sometimes watching YouTube videos or playing music in the YouTubeMusic tab. I may do some editing in Google Docs. The laptop sometimes runs hot and the fan works overtime but only when processor intensive tabs are opened like AirTable. The only hardware problem I have is the camera which ceases to function under Linux. For me this is not a problem but it might be for others who want to use programs like Zoom or the like. The battery of course after all these years is very weak and is rapidly depleted when not connected to an AC power outlet.

The Raspberry Pi 4 performs well enough given that it is a budget device. It could definitely benefit from 8GB of RAM instead of only half that. At times there is a noticeable lag in keyboard response if too many tabs are open in the Chromium browser. The Bluetooth is faulty and I've been unable to connect wireless earphones to the device. This is a problem since for some unknown reason there is no earphone jack. I've created a workaround that I've discussed in an earlier post. The keyboard is far less satisfying than the one of the laptop. The lack of a fully fledged browser like Chrome is annoying but with the Raspberry Pi OS that's what you get. I've tried booting into Linux but things didn't go and again I've described the experience in earlier posts. There's no battery for the Pi, it must be connected to an AC power supply but its form factor makes it very portable. To function, it just needs power and a monitor or TV.

The MacBook Pro model that I have is currently selling for about US$250 on Amazon while the Raspberry Pi 400 Personal Computer Kit is selling for about US$100.

Installation of Linux Mint 20.3

You can't say that there's no technological excitement in my life. I finally had to abandon the use of Ubuntu on my 2013 MacBook Pro. The keyboard, trackpad and mouse freezes were becoming too frequent and numerous reboots were required to activate these devices. Finally no amount of rebooting could activate them and so I turned to Linux Mint.

The installation went smoothly enough but the boot up process was, and continues to be, interrupted by a series of error messages. That is a minor irritation but far worse was to come. I discovered that the OS didn't recognise the WiFi adapter in the laptop. So, for the moment, no WiFi but thankfully I have an Ethernet connection. I had an old TP-LINK WiFi dongle that must be at least a decade old and I tried that out but no luck. Perhaps a can buy a more up-to-date dongle that works. This is a matter for deeper investigation but for the moment, as long as the keyboard, mouse and trackpad don't freeze up on me, I'll be happy.

 

 

My initial attempt to install the Chrome browser failed but then I was reminded that flatpak is built into Linux Mint and, by using that, the installation of the Chrome browser and also Calibre was straight forward. So far, after a couple of days of using Linux Mint, I've had no problems and I hope things stay that way.

I've put out a request for help on the Linux Mint Forums and hopefully help will be forthcoming. So far 20 views but no comments. However, it's been up less than an hour. 

I'll add an addendum if help arrives.

ADDENDUM

... and help did arrive! A user called sleeper12 offered two suggestions. The first was:

inxi -Fxxxrz && rfkill list && iwconfig && mokutil --sb-state 

This had no effect but the second suggestion did the trick:

sudo modprobe -r wl && sudo modprobe wl && sudo systemctl restart network-manager.service 

This is great news and my laptop is now fully functional, apart from the webcam that I assume is still not working. I should ask for help with that on the forums as well.

Raspberry Pi: Web Browser Woes

The Chromium browser is fast and responsive on the Raspberry Pi. However, it cannot deal with my Google identity which is odd considering that it the base on which the Chrome browser is built. I have subscribed to YouTube Premium and, while I can log into YouTube and YouTube Music, the advertisements still play and my identity is quickly forgotten as I navigate about. Gmail can be accessed briefly until it drops out and I'm asked to confirm my identity yet again.

Other websites are accessed without difficulty but the browser seems incapable of handling my Google credentials. I was so frustrated that I downloaded an alternative browser called Vivaldi. However, I quickly uninstalled it because it was painfully slow in accessing websites or simply timed out. Attempts to install Chrome failed and that's probably a good thing as this browser is resource intensive and would probably end up performing like Vivaldi given that I only have 4GB of RAM. It looks like I'm stuck with the Chromium browser.

There's surprisingly little help online regarding my problem but I've only just begun looking so something may show up ... and just after writing this something did show up! Figure 1 shows the crucial setting.

Figure 1

Under "Other Google services", there is the toggle "Allow Chromium sign-in" with the comment that "By turning this off, you can sign into Google sites like Gmail without signing into Chromium". The toggle is turned OFF now but it was ON by default and that was the source of all my troubles. Chromium is now behaving a Chrome does allowing me to access Gmail, YouTube, YouTube Music etc. without any problems. It was a huge relief to overcome this nagging problem.

The Experiment Is Over

It was exciting while it lasted but after a few days, the flaws began to outweigh the attractions. I'm taking about the installation of Chrome OS Flex to replace the Mac OS on my 2013 Mac Book Pro. In summary, the defects of the installation included:

• a frustrating time lag between opening the lid of my laptop and seeing an active screen: I never timed this precisely but it started to get under my skin because I would stare at a blank screen for what seemed like a minute or more and no amount of key presses would make a difference.
  
  
• unresponsiveness of the track pad: having long abandoned a mouse when using my laptop, it was frustrating to have to rely on a mouse again but it was necessary as the pointer would become unresponsive every few seconds. This rendered it virtually unusable. Worse still, once I connected the laptop to an external monitor, even the mouse became "twitchy".
  
  
• total lack of support for Linux: even though I'd apparently installed Linux, there was no way to open to get a functioning terminal window. I was always confronted with an error message and so no installation of Linux apps was possible.

So Chrome OS Flex is gone, replaced by Ubuntu 20.04. I've had long experience with this operating system and there is widespread community support for it. Problems have arisen of course but all of the previously mentioned problems are gone. What remain are a non-functioning webcam and an apparent incompatibility between Calibre and the latest version of Ubuntu. I'll address these in the coming days.

The problem with Flex is that it was just too "beta". I'm sure once this OS evolves, it may well be a viable alternative to Ubuntu but for now that's not the case. As mentioned in an earlier post, I've installed Ubuntu on my granddaughter's HP Pavilion x360 as well. 

While the HP laptop desperately needed a replacement for the sluggish and unresponsive Windows OS, the Mac Book was still operating well enough under Mojave. I hadn't installed Catalina because it didn't support 32-bit applications and I wanted my astrolog.exe to continue running under Wine. I thought a lighter weight operating system like Chrome OS Flex would reinvigorate my ageing Mac which I guess it did if the problems created were ignored.

Right now, with Ubuntu running, the fan on my laptop is whirring even though I only have the Chrome browser open with 13 tabs. Figure 1 shows a screenshot of the system monitor.

Figure 1

I'm thinking that things are not all that different, performance-wise, from when I had the Mac OS installed. Anyway for now I'm happy to have far fewer problems than I had with Flex.

I've now installed WhatsApp and connected that app to my iPhone so that's a positive. There is no way that this could have happened on Flex, in its current state. Similarly my Express VPN is now up and running.

Twitter Fail

I knew that Twitter was planning to increase the character limit for tweets from 140 to 280 but I thought it was yet to be rolled out to the majority of users. It came as some surprise to learn that it had been rolled out in early November of 2017. I regularly use the Twitter app on OS X for tweeting from my three Twitter accounts and had not noticed any change.

This is Twitter version 4.3.2 and so I naturally thought I'd forgotten to update. A check at the App store however, revealed that I had the latest version but it hadn't been updated since March 2017. What a joke! Anyway, I've now deleted the app and will open three separate browsers for my three separate accounts: Chrome for @SeanReeves, Safari for @BabaParvardigar and Firefox for @voodooguru1949. I could use Tweetdeck to handle the multiple accounts but I noticed that it hasn't been updated in quite a while so I'm not going to take the risk. I'll stick to browsers as much as possible now and eschew OS X apps.

UPDATE: I did finally download Tweetdeck in February of 2018 and have registered all three accounts. It seems to be working fine at the moment.