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I just need a temporary fix to read an external USB disk with an ext4 file system (running 10.04, external boot). I can't boot with this disk on this machine but would like to access files
Just plug it in to your Linux system -- there's no issue reading an ext4 (or ext3 or ext2 or FAT or reiserfs or xfs ....) filesystem. Just be sure to "safely remove" before you disconnect it.
Yes thanks for replying but as I wrote in the first post:
I can't boot with this disk on this machine
Maybe the BIOS or hardware is at issue. I've had the USB boot run pretty slow on other public machines too.
I just wanted a temporary fix, if it were possible.
I was all set to migrate to 10.04 on my old home box, 'till I AGAIN had another problem with "unmanaged" and therefore OFFLINE network manager. ( I was able to fix that, 'till it recurrs and also downloaded Wicd on the USB boot disk).
The BIOS has to have USB boot enabled, and then the removable USB device has to be ahead of the internal hdd in the BIOS boot sequence. If you're trying it on older PCs found in public places, you might have found machines that don't support booting from USB.
I do know that already. My home computer has a bios that does basically support the booting but is not very modern. It gets to 10.04's login, starts the splash screen but burps back to the login.
Many of the referenced public computers have been set to usb boot as priority by an enterprising netizen but still require pressing a key (Function 12) and selecting from a "one time boot menu" (Dell optiplex). Good enough in that regard.
When I mentioned a slow public machine, 'twas at a 'net cafe'. I had thought that it's native copy of windows was the culprit but I used firefox on both windows and my 10.04 boot and sometimes Firefox is a buggy resource hog.
It gets to 10.04's login, starts the splash screen but burps back to the login.
OK, that is NOT a booting problem, that is a "User locked out of his account for some reason" problem. There are several causes -- take a look at #10 on the FAQs in my signature.
but why does it work fine booting via USB on other desktops?
Do you mean it boots other desktop environments like Gnome or xfce? That makes sense -- that means that only your KDE configuration is broken. "Booting" ends when the Linux kernel is loaded and running. Starting an X session, with desktop environment, is a post-booting event.
If you are not totally attached to your KDE customizations, then you can move/rename the hidden .kde folder in your user's home directory, shutdown X (or just reboot) and it should log you in. You'll have to use the tty console to rename .kde, since KDE won't come up.
So, it is happy to display on the Radeon HD3450, but it does not like your Unichrome S3 VT8378. I have never installed on a S3, but I would assume the video driver that you want to load, when running on your home machine, is xserver-xorg-video-s3. I'm not sure what the kernel module name is. But you need to check the Ubuntu video guidance for 10.04 and verify.
For each different computer that you try to boot on, you'll have to adapt the installed configuration to the video hardware on your target computer (i.e. load the needed kernel module).
BTW, if you use a "Live CD" configuration for your bootable OS, you can avoid this issue (but trade it for others, like "persistence", etc.).
On my HOME machine, I just tried a fresh install of 10.04. on an INTERNAL IDE Hard Disk Drive that I wiped/formatted and guess what, it did the SAME THING!!!
After what seemed to be a successful install, it accepted my login/password but hiccuped during the splash screen and burped back to the same graphic login prompt...
This box had ran 8.04 fine... Well, actually it has been a bit wonky/screwy...
I booted a couple versions of Puppy Linux and they seemed to be fine but I need KPPP for the moment /dve/ttyACM0
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