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Offline Brianrh

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Re: Chromebook conversion
« Reply #30 on: June 14, 2019, 02:50:18 am »
The ArchWiki page on the Acer C720 referred to above, has instructions how to remove the bottom cover and unscrew the Write-Protect screw. Also photo showing which screw to unscrew.

Offline perknh

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Re: Chromebook conversion
« Reply #31 on: June 14, 2019, 07:06:18 am »
I think the C710 only had 2G RAM when new but I expanded to 4G.

I seem to think when I originally looked into this problem I seem to remember that perhaps the quantity of RAM wasn't so important as the fact you were actually stipulating a quantity to use. It might be worth trying mem=2G or even mem=1G and see if you get the same error message.

Yep, that did it -- BINGO!  I had to set its memory parameter to mem=1G! :o   (And what a good memory you have, Brianrh, in being able to remember that little historic fact about these old Acer Chromebooks.)  Now does setting this Chromebook's memory parameter to 1G mean that this Chromebook will now ONLY have access to 1G of memory?  Will doing so cause this Chromebook to lose access to the other 3G of memory that would normally be available to it?  I ask because I'd hate for my wife to lose access to 3Gs of memory on her old Chromebook because of some odd little Acer idiosyncrasy. :-\

Wow, what an endeavor that was!  Thank you, everyone, for your help here. :)
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Offline Brianrh

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Re: Chromebook conversion
« Reply #32 on: June 14, 2019, 08:20:59 am »
I'm sorry I don't understand how this instruction works, I found it on the Linux Mint forum and it worked on my Chromebook.

After needing this instruction when running live from USB, it's not requested after installation and subsequent boot ups so perhaps from there on the system detects the amount of RAM physically available.

Hopefully a more knowledgeable person will come along and can answer that for us.

Offline PCNetSpec

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Re: Chromebook conversion
« Reply #33 on: June 14, 2019, 06:08:24 pm »
What does
Code: [Select]
free -m
report ?
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Offline perknh

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Re: Chromebook conversion
« Reply #34 on: June 14, 2019, 10:32:30 pm »
What does
Code: [Select]
free -m
report ?

Code: [Select]
ecuaperk@peppy:~$ free -m
              total        used        free      shared  buff/cache   available
Mem:           3885        1049        1877         266         958        2346
Swap:           707           0         707
ecuaperk@peppy:~$
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Offline PCNetSpec

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Re: Chromebook conversion
« Reply #35 on: June 15, 2019, 04:18:48 am »
Yep, looks like it's seeing it all :)
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Offline perknh

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Re: Chromebook conversion
« Reply #36 on: June 15, 2019, 09:54:10 am »
Great...thanks. :)  I actually like my wife's Chromebook better now after I put it into developer mode.  Besides, I don't like how Google tries twisting our arms in order to buy more Chromebooks after reaching an arbitrary EOL.  That's not cool!


Question:

After defining the memory parameters following quiet splash (ex. mem=4), will that device be constrained to using that amount of RAM and ONLY that amount of RAM as its maximum amount of RAM thereafter?

My hunch is yes, but I figure it doesn't hurt to double-check with an expert since I don't do Chromebook conversions often.

Thank you.
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Offline PCNetSpec

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Re: Chromebook conversion
« Reply #37 on: June 15, 2019, 10:09:22 am »
Question:

After defining the memory parameters following quiet splash (ex. mem=4), will that device be constrained to using that amount of RAM and ONLY that amount of RAM as its maximum amount of RAM thereafter?

My hunch is yes, but I figure it doesn't hurt to double-check with an expert since I don't do Chromebook conversions often.

Thank you.

Apparently not,
Code: [Select]
free -m
shows that all 4GB was available to the system .. even though you'd entered mem=1G

Quote
        mem=nn[KMG]     [KNL,BOOT] Force usage of a specific amount of memory
                        Amount of memory to be used when the kernel is not able
                        to see the whole system memory or for test.
                        [X86] Work as limiting max address. Use together
                        with memmap= to avoid physical address space collisions.
                        Without memmap= PCI devices could be placed at addresses
                        belonging to unused RAM.

Suggests your mem=1G only applies until the kernel is fully loaded .. then the kernel takes control of memory.

In other words it's setting a max memory size for initial kernel / firmware loading .. it's NOT a limit on available memory for applications.
« Last Edit: June 15, 2019, 10:13:03 am by PCNetSpec »
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Offline perknh

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Re: Chromebook conversion
« Reply #38 on: June 15, 2019, 12:07:15 pm »
Now that's with Ubuntu's minimal installation which I did without setting any memory parameters.  Would the same be so with Peppermint after setting its memory to mem=1?

P.S.

I've downloaded Peppermint 9 too, and it has the same boot issue as 10.

P.P.S.

Just spoke with a neighbor who works with an Ubuntu server for a living.  He wonders if perhaps I set the memory for splash at at mem=1G, and then install, if then the system should recognize that it has 4G of memory available to it after that.  He wonders if the initial 1G of splash memory might then convert itself into 1G of swap.  If so, that would be perfect for a 16 gigabyte hard drive.
« Last Edit: June 15, 2019, 02:55:15 pm by perknh »
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Offline Brianrh

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Re: Chromebook conversion
« Reply #39 on: June 15, 2019, 03:02:28 pm »
It did for me. If it will run live from a USB with the mem=1G then it should install and be okay. Again it was for me.

Did you ever try mem=2G?

If it doesn't you can always go back to plain Ubuntu which is still better than ChromeOS.

Offline PCNetSpec

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Re: Chromebook conversion
« Reply #40 on: June 15, 2019, 03:19:10 pm »
I think the mem= boot parameter is only necessary for installation (ie. not required post-install).

But there's only one way to check...

Also there's only to test if the memory parameter limits available RAM .. apply it in a live environment, then check the
Code: [Select]
free -m
output
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Offline perknh

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Re: Chromebook conversion
« Reply #41 on: June 15, 2019, 03:23:50 pm »
It did for me. If it will run live from a USB with the mem=1G then it should install and be okay. Again it was for me.

Did you ever try mem=2G?

If it doesn't you can always go back to plain Ubuntu which is still better than ChromeOS.

Yes, I did try mem=2G, but no luck.  Right now the Chromebook is running plain Ubuntu, and, yeah, it is a lot better than ChromeOS.  I'm liking it, anyway.

I also discovered the Chromebook can be booted with a simple CTRL + L instead of CTRL + L + ESC + 1.  Booting a Chromebook by pressing two keys is simple enough to do on a regular basis.  That's not a big deal. ;)
I think the mem= boot parameter is only necessary for installation (ie. not required post-install).

But there's only one way to check...
« Last Edit: June 15, 2019, 03:59:19 pm by perknh »
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Offline PCNetSpec

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Re: Chromebook conversion
« Reply #42 on: June 15, 2019, 03:30:38 pm »
First boot the LiveUSB with the mem=1GB applied .. and post the output from:
Code: [Select]
free -m
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Offline perknh

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Re: Chromebook conversion
« Reply #43 on: June 15, 2019, 04:18:05 pm »
No luck, I'm unable to do so now.  For whatever reason I can no longer load Peppermint 9 or Peppermint 10 with mem=1G.  I've tried doing so with both versions of Peppermint and with my Sony 4G flash drive and my PNY 16G flash drive.  I'm having no luck with any of this any longer.

This is now the memory output from Ubuntu with the wireless mouse connected.  It's changed a little from last night.

Code: [Select]
ecuaperk@peppy:~$ free -m
              total        used        free      shared  buff/cache   available
Mem:           3885        1149        1587         256        1148        2235
Swap:           707           0         707

Sorry, I don't know what to say, other than maybe this is because the Chromebook is now charging.  I mean, why would I be able to install Peppermint 9 this morning, or Peppermint 10 yesterday evening, with mem=1G, but not be able to do so now?  :-\

What do you think?  Do you think I'd be wise to leave well enough alone -- even if it's not my nature to do so?  Hey, at least this old Chromebook is still working! :)

EDIT & UPDATE:

I'm in Peppermint Live!  Here you go, PCNetSpec:

Code: [Select]
peppermint@peppermint ~ $ free -m
              total        used        free      shared  buff/cache   available
Mem:           3885         299        2350         105        1235        3246
Swap:          1942           0        1942
peppermint@peppermint ~ $

From what I can see, I'm good.* Why Peppermint 9, you ask?  Theme colors are livelier than on Peppermint 10, and I want to bring this Chromebook to life! :)

* mem=1G wouldn't work for me while this Chromebook was charging.


FINAL UPDATE:

Info on memory after installing Peppermint 9 with mem=1G.  It looks to me that when you set the whatever you set the memory parameters to after splash is exactly what you get.  But on the other hand, as Brianrh said earlier, the Chromebook does appear to be working fine -- though it's only run for about a half hour so far.  Also, as Brianrh has said, the trackpad doesn't work worth squat.

Code: [Select]
ecuaperk@peppy ~ $ free -m
              total        used        free      shared  buff/cache   available
Mem:            984         360         145          47         479         433
Swap:           707          29         677
ecuaperk@peppy ~ $

And here's the inxi -Fz info:

Spoiler (click here to view / hide)
ecuaperk@peppy ~ $ inxi -Fz
System:    Host: peppy Kernel: 4.15.0-43-generic x86_64 bits: 64 Desktop: N/A
           Distro: Peppermint Nine
Machine:   Device: desktop System: Acer product: Peppy v: 1.0 serial: N/A
           Mobo: N/A model: N/A serial: N/A BIOS: coreboot v: N/A date: 03/02/2017
Battery    BAT0: charge: 22.3 Wh 66.5% condition: 33.6/44.7 Wh (75%)
           hidpp__1: charge: N/A condition: NA/NA Wh
CPU:       Dual core Intel Celeron 2955U (-MCP-) cache: 2048 KB
           clock speeds: max: 1400 MHz 1: 1119 MHz 2: 1067 MHz
Graphics:  Card: Intel Haswell-ULT Integrated Graphics Controller
           Display Server: x11 (X.Org 1.19.6 )
           drivers: modesetting (unloaded: fbdev,vesa)
           Resolution: 1366x768@60.00hz
           OpenGL: renderer: Mesa DRI Intel Haswell Mobile version: 4.5 Mesa 18.2.8
Audio:     Card-1 Intel 8 Series HD Audio Controller driver: snd_hda_intel
           Card-2 Intel Haswell-ULT HD Audio Controller driver: snd_hda_intel
           Sound: Advanced Linux Sound Architecture v: k4.15.0-43-generic
Network:   Card: Qualcomm Atheros AR9462 Wireless Network Adapter driver: ath9k
           IF: wlp1s0 state: up mac: <filter>
Drives:    HDD Total Size: 16.0GB (38.0% used)
           ID-1: /dev/sda model: KINGSTON_SNS4151 size: 16.0GB
Partition: ID-1: / size: 15G used: 5.7G (41%) fs: ext4 dev: /dev/sda1
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 98.0C mobo: N/A
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 173 Uptime: 28 min Memory: 570.3/984.8MB
           Client: Shell (bash) inxi: 2.3.56
ecuaperk@peppy ~ $
[close]


« Last Edit: June 15, 2019, 07:06:52 pm by perknh »
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Offline PCNetSpec

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Re: Chromebook conversion
« Reply #44 on: June 15, 2019, 08:00:43 pm »
which version of Ubuntu worked without the parameter ?

maybe you could move to the 5 series kernel, and remove the parameter.
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