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On Tuesday 27 October 2009 03:38:53 Maxim Wexler wrote: |
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> Ok, this is too weird. While mucking around in the kernel I noticed |
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> that the scroll back buffer wasn't set. So I configured it and gave it |
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> 128 bytes to play with. |
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It's 128 kilo bytes just btw :-) |
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> Sez I, well at least I'll be able to scroll |
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> back to the start of all that verbiage. That's the only change I've |
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> made since turning USB_STORAGE debugging off. |
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> |
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> After a reboot, dmesg behaved and gives me a complete rundown on |
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> startup all the way back to the prompt! |
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> |
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> So, since in the digital world, things don't "just happen", can |
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> someone enlighten me, or anyone else who's interested, in the |
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> connection between the scrollback buffer and usb-storage, if any? |
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There isn't a connection. Why do you think there is one? |
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You enabled scrollback so now the console has retained enough of the kernel |
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console output that you can scroll back to the beginning without using all |
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128K. |
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Symbol: VGACON_SOFT_SCROLLBACK_SIZE [=256] |
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Prompt: Scrollback Buffer Size (in KB) |
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Defined at drivers/video/console/Kconfig:37 |
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Depends on: HAS_IOMEM && VT && VGACON_SOFT_SCROLLBACK |
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Symbol: VGACON_SOFT_SCROLLBACK [=y] |
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Prompt: Enable Scrollback Buffer in System RAM |
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Defined at drivers/video/console/Kconfig:22 |
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Depends on: HAS_IOMEM && VT && VGA_CONSOLE |
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Symbol: USB_STORAGE [=m] |
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Prompt: USB Mass Storage support |
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Defined at drivers/usb/storage/Kconfig:9 |
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Depends on: USB_SUPPORT && USB && SCSI |
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Symbol: USB_STORAGE_DEBUG [=n] |
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Prompt: USB Mass Storage verbose debug |
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Defined at drivers/usb/storage/Kconfig:27 |
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Depends on: USB_SUPPORT && USB_STORAGE |
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Symbol: USB_SUPPORT [=y] |
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Prompt: USB support |
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Defined at drivers/usb/Kconfig:5 |
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Depends on: HAS_IOMEM |
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-- |
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alan dot mckinnon at gmail dot com |