2.16 boots great from cd, but no video if booted from USB

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squidge
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Joined: Sun 20 May 2007, 19:08

2.16 boots great from cd, but no video if booted from USB

#1 Post by squidge »

Using 2.16 from a CD and I love it. Problem is, when I install to USB, everything seems to be booting fine until the "XORG or XVESA" video choices. No matter what I enter, I get a garbage display on my laptop. But the display is perfect when booted from the CD, even though I'm choosing the same XORG settings. What's the difference? Does the USB install not have the same drivers as the CD? And if not, how can I add them? Very frustrated.
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rcrsn51
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#2 Post by rcrsn51 »

Did the file zdrvxxx.sfs get copied from the CD onto the USB drive?
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squidge
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#3 Post by squidge »

Yes it did; haven't compared the two by checksum, but it was the exact same filesize as the one on the cd, so I'm assuming it's intact. And I've tried making the usb version a couple of times on different drives, so I know it's not just a fluke on one of the drives, like a bad sector or something. I get the garbage display from the usb every time, perfect video from the cd.
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BarryK
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#4 Post by BarryK »

Did you use the Universal Installer to install to usb?
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squidge
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#5 Post by squidge »

Yes, and followed all directions. Installed it on at least 3 usb drives with the same result. If no Puppy version worked with my display, I'd chalk it up to having a funky video setup. But with the CD working flawlessly, and the USB installation giving me video garbage, I'm at a loss. Are there any additional drivers, utilities, etc. that I can load onto the USB which might make the difference?
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Dougal
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#6 Post by Dougal »

Do you have a pup_save file on theon the pendrive?
If you don't, I don't think the zdrv will be found -- the zdrvfind code doesn't seem to search everywhere, just on cd and /mnt/home.
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squidge
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#7 Post by squidge »

Yes, the save file is on the usb drive.
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Bruce B

#8 Post by Bruce B »

Just some comments because I don't know the answer.

Trying it on three usb devices pretty much eliminates the bad sector theory.

I might want to compare files on the CD with the USB to make sure the byte sizes are the same and all the expected files exist. An md5sum file by file comparison could also be done, although it takes some time.

I'd be interested in knowing exactly how you are booting the USB device.
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BarryK
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#9 Post by BarryK »

squidge wrote:Yes, the save file is on the usb drive.
I hope that you didn't copy the 'pup_save' file from the hard drive?
You bootup from usb without any pup_save, and create it on first shutdown.
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squidge
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#10 Post by squidge »

Yes, I chose the usb drive as the place to save the file when prompted on first shutdown.
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