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Author Topic: Calling all Linux Kernel developers!  (Read 387344 times)

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Offline merauder75

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Re: Calling all Linux Kernel developers!
« Reply #585 on: January 22, 2013, 10:28:24 pm »
Hey, anyone willing to test a file system image? I am having issues with my storage medium not getting set up right (I switched to a linux VM instead of an actual machine to format my USB drive). Let me know if this boots at all. It's got python, vim, lua, and ruby installed on it, along with x windows (its based off of xconfig from tiplanet.org/nspire-linux-builds) To use the image, here is a copy of Vogtinator's instructions

Do the following: (/dev/sdX(X is the letter of usb drive, find it with mount command) = USB-Stick)
1. mkdir /tmp/mount
2. mkfs.ext4 /dev/sdX
3. mount /dev/sdX /tmp/mount (ignore warnings)
4. tar -xvf rootfs.tar.bz2 -C /tmp/mount
5. umount /tmp/mount

Download link: https://www.dropbox.com/s/9fundz78mzcox46/rootfs.tar.bz2
You also need to use this kernel: http://tiplanet.org/nspire-linux-builds/zImage_expanded_20130119_2110.tns

« Last Edit: January 23, 2013, 08:21:25 am by merauder75 »
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Offline Lionel Debroux

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Re: Calling all Linux Kernel developers!
« Reply #586 on: January 23, 2013, 02:00:30 am »
Nowadays, /dev/sda is usually the host disk of the host computer (or the VM), so you probably mean /dev/sdb :)
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Offline Vogtinator

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Re: Calling all Linux Kernel developers!
« Reply #587 on: January 23, 2013, 07:48:05 am »
Otherwise you'll get HUGE problems ;)
« Last Edit: January 23, 2013, 07:48:11 am by Vogtinator »
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Offline InspiredByCas

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Re: Calling all Linux Kernel developers!
« Reply #588 on: January 23, 2013, 07:57:09 am »
Quote
Nowadays, /dev/sda is usually the host disk of the host computer (or the VM), so you probably mean /dev/sdb

Better change this before an idiot types this in an terminal on his pc....
« Last Edit: January 23, 2013, 08:04:38 am by InspiredByCas »
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Offline Hooloovoo

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Re: Calling all Linux Kernel developers!
« Reply #589 on: January 23, 2013, 07:57:51 am »
I wrote a script to do that about 10 minutes before you posted :)
The filesystem works, I know that the python and vim work, but I don't know how to use ruby and lua.
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Offline Vogtinator

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Re: Calling all Linux Kernel developers!
« Reply #590 on: January 23, 2013, 07:58:05 am »
Quote
Better change this before an idiots types this in an terminal on his pc....
/dev/<usb> would be better, many use a second hdd.

Edit: Too late, I hate caching..
« Last Edit: January 23, 2013, 03:07:05 pm by Vogtinator »
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Offline tangrs

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Re: Calling all Linux Kernel developers!
« Reply #591 on: January 23, 2013, 08:10:43 am »
Quote from: fortytwo on January 22, 2013, 06:01:13 pm
Is it possible to get X working on a click pad/touchpad? Mine complains about the color depth being unsupported. Is there a way around that?

Yep, I get that too. It seems that the fbdev Xorg driver doesn't support 4bpp hence X can't run either.
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Offline merauder75

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Re: Calling all Linux Kernel developers!
« Reply #592 on: January 23, 2013, 08:23:00 am »
Good, so my filesystem works, I guess my errors/kernel panic are coming from the microSDHC card I was using (or my VM setup, or something else).
« Last Edit: January 23, 2013, 08:23:19 am by merauder75 »
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Offline Vogtinator

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Re: Calling all Linux Kernel developers!
« Reply #593 on: January 23, 2013, 08:33:51 am »
The contoller http://hackspire.unsads.com/wiki/index.php/Memory-mapped_I/O_ports#C0000000_-_LCD_controller
Supports 8 bpp. Maybe just use 8bpp instead of 4bpp?
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Offline Lionel Debroux

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Re: Calling all Linux Kernel developers!
« Reply #594 on: January 23, 2013, 08:43:12 am »
When TI's OS is running, using 8 bpp requires putting the screen buffer in SDRAM, otherwise some variables used by the OS are corrupted. But without TI's OS, is the SRAM large enough to put the screen buffer there ?
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Offline tangrs

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Re: Calling all Linux Kernel developers!
« Reply #595 on: January 23, 2013, 08:44:45 am »
Quote from: Vogtinator on January 23, 2013, 08:33:51 am
The contoller http://hackspire.unsads.com/wiki/index.php/Memory-mapped_I/O_ports#C0000000_-_LCD_controller
Supports 8 bpp. Maybe just use 8bpp instead of 4bpp?

The controller might support it but the panel doesn't. I've already tried :(

Edit: unless I'm missing something... Was it ever possible to use 8bpp in Nspire OS? Linux renders the screen weirdly when I try to use 8bpp mode.

Edit2: Just had an epiphany. It is most likely possible after all. I made a wrong conclusion XD I'll give it a whirl again tomorrow.
« Last Edit: January 23, 2013, 08:52:13 am by tangrs »
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Offline Vogtinator

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Re: Calling all Linux Kernel developers!
« Reply #596 on: January 23, 2013, 08:57:21 am »
Ok. 'cause there's written:
Quote
101 = 24 bpp (not applicable to TI-Nspire's STN LCD)
.
So apparently even 16 bit are possible? That'd be even better!
But why doesn't TI use this? SRAM can't be the reason
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Offline Lionel Debroux

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Re: Calling all Linux Kernel developers!
« Reply #597 on: January 23, 2013, 09:00:35 am »
In 8 bpp mode, one has to define a palette ( http://hackspire.unsads.com/wiki/index.php/Memory-mapped_I/O_ports#C0000000_-_LCD_controller ), otherwise the screen is indeed weird.
nDOOM, among others, uses 8 bpp mode - but in SDRAM, as I wrote. Since we don't have to worry about not erasing the variables for TI's OS, maybe the SRAM is large enough to contain a double-sized screen buffer ? :)
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Offline Levak

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Re: Calling all Linux Kernel developers!
« Reply #598 on: January 23, 2013, 09:11:28 am »
Quote from: Vogtinator on January 23, 2013, 08:57:21 am
Ok. 'cause there's written:
Quote
101 = 24 bpp (not applicable to TI-Nspire's STN LCD)
.
So apparently even 16 bit are possible? That'd be even better!
But why doesn't TI use this? SRAM can't be the reason
Speed issues ?
Also, yes, they have SRAM problems, even in 4bpp.
« Last Edit: January 23, 2013, 09:12:09 am by Levak »
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Offline Vogtinator

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Re: Calling all Linux Kernel developers!
« Reply #599 on: January 23, 2013, 09:27:25 am »
The CX doesn't use the SRAM and it's fast enough.
I have seen a Clickpad, but I think the (crappy) LCD is the issue, not the storage

Edit: I got a full busybox initrd working.. Just 720 KB!
Edit2: Initrd with links and direcfb (for images): 3.2 MB, had to increase ramdisk size in kernel config
Edit3: http://tiplanet.org/nspire-linux-builds/initrd.tns
« Last Edit: January 23, 2013, 03:09:26 pm by Vogtinator »
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