Extending battery life can be achieved by limiting screen brightness. Ubuntu 13.10 (Saucy Salamander) by default sets screen brightness to 100%. I have found that 50% screen brightness is more than adequate for indoor viewing. Saucy currently doesn't save your screen brightness settings when you log out or shut down. Through some web searches, I discovered "xbacklight". It's a command-line utility to set your screen brightness. You install it, add it to your startup programs and set the screen brightness to a default level of your choosing.
xbacklight is available through Ubuntu Software Center or via the terminal ("sudo apt-get install xbacklight").
Search (super-key) for "Startup".
Click on "Startup Applications".
Click the "Add" button.
Command: xbacklight -set XX (Where "XX" is the numerical percentage of screen brightness)
Here is a screen-shot:
Save your new Startup Application and restart to test your new default screen brightness!
Monday, December 16, 2013
Thursday, November 21, 2013
|Chromebook compatibility list : Sheet1|
|HP Chromebook 14 Compatibility List|
|Time from Ctrl+D or Ctrl+L to Login||About 8 seconds||About 12 seconds|
|Wifi||Automatically detects networks||Automatically detects networks|
|HSPA+ 3G modem||Pre-configured for T-mobile||User selects carrier and data plan (T-mobile)|
|Wired network via USB adapter||Works "plug and play"||Works "plug and play"|
|Trackpad/scrolling||Pre-configured||Pre-configured by Chr-Ubuntu|
|Bluetooth||Works - tested Motorola S9 Headphones||Works - tested Motorola S9 Headphones|
|User Accounts||Multiple with Account or guest||Multiple with Admin, User, Guest|
|Sound||Pre-configured||Works "out of the box"|
|Brightness||Hotkey adjustment||Adjustable in settings|
|HDMI video-out||Works - tested BenQ monitor||Works - tested BenQ monitor|
|Video playback||Supports most formats||Supports more formats (such as .wmv)|
|Google Hangouts video chat||Pre-configured||Works with Linux plug-in from Google|
|Google Earth||Not available||Works but requires recompiling .deb file|
|Libre Office||Not available||Available|
|Photo Editing||A few good online apps||Many Editor options like GIMP|
|USB mass storage||Works mostly including USB 3.0||Works mostly including USB 3.0|
|Local USB printer||Not available||Most work with pre-installed CUPS drivers|
|Local USB scanner||Not available||Works with tested HP scanner and HPLIP|
|USB DVD Playback||Not available||Works with Ubuntu restricted extras and DCSS|
|DVD Movie Ripping||Not available||AcidRip converts movies to AVI: 2.5H in 45 mins|
Sunday, November 17, 2013
I have a Brother HL-2240 monochrome laser printer that does the bulk of my home printing. Trying to be clever and install the official Brother drivers wasn't working. It was working with my Thinkpad running Ubuntu Raring Ringtail (12.04), so I checked to see what driver was installed. Apparently I had installed HPLIP for a wireless all-in-one inkjet. The working driver was for a Brother HL-2170W; not the recommended driver, but the HPijs-Pcl-5e driver. I had to install the HPijs driver package (used Ubuntu Software Center), restart and then manually choose the HPijs-Pcl-5e driver.
Saturday, November 16, 2013
Thursday, November 14, 2013
Update: I now have successfully installed Ubuntu Saucy using Jay Lee's Chr-Ubuntu script (9sgchs). Now I have a dual-boot ChromeOS/Ubuntu 13.10 laptop. I tested the built-in t-mobile modem and it works just as it does in ChromeOS. I tried to "plug and play" install my brother USB Laser Printer, but it didn't work. I think I'll have to install the drivers from Brother manually. I am still having a major ChromeOS issue. The system crashes at the Chrome login screen and restarts to the "Chrome is missing or damaged" error when not on AC power. It has got to be a ChromeOS problem, because using the Legacy boot into Ubuntu works plugged-in or on battery power. I guess this is going to be mainly my Ubuntu machine for now until there is a fix. When I have some free time I will try to test some other peripherals.
Sunday, November 10, 2013
I can only login to ChromeOS when the AC adapter is plugged in. If I unplug once I am logged in, ChromeOS restarts and then shows the "ChromeOS is missing or damaged" screen. I then press the power button to turn it off, plug in the AC adapter and everything works again. The screen will stay on forever even when unplugged so I do not think it is a battery problem. I will have to open it up again and check my connections.
Friday, November 8, 2013
Re-write GUID Partition Table (GPT) using NGFF to SSD Adapter
Here is the adapter I used to access my unbootable ChromeOS NGFF SSD:
As you can see, it adapts a NGFF SSD so that it fits into a standard Serial ATA interface port.
Pictured here is the adapter is on top of a Serial ATA 2.5" hard drive. Notice that the connector is identical.
I inserted my 128GB NGFF SSD into the Adapter:
Then, I inserted the Adapter into a USB to Serial ATA drive Adapter:
I connected this drive to my Ubuntu-Linux laptop and fired up GParted:
Next, from the GParted menu I chose Device/Create Partition Table:
From the drop-down box select "gpt".
I did not create any partitions. I just left it unallocated:
Next, I opened up my Chromebook and replaced the stock SSD with my 128GB SSD. I plugged in my recovery USB memory stick and ChromeOS (Falco) was restored and is working properly again.
Monday, November 4, 2013
NGFF stands for "Next Generation Form Factor". SSD is of course, "Solid State Drive". These drives are 22x42x1mm (aka "2242"). There are also NGFF SSDs that are much longer (2260,2280...) and those will not fit in the Chromebook. On the left is one I installed, on the right is the original HP part.
Note: I had problems with this 128GB drive.
ChromeOS somehow was corrupting the GPT and would not boot. I tried Chrome recovery and now this drive will not boot at all. I am trying to figure out how I can repair it. I think I will get an adapter so that I can connect it via USB and re-write the partition tables. I re-installed the OEM 16GB SSD and everything is working again using ChromeOS and Crouton/Saucy Salamander.