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    SubjectRe: [patch #2] vesafb: panning and palette changes using bios
    On Sun, 9 Aug 1998, Shawn Leas wrote:

    > On Sat, 8 Aug 1998, Gerd Knorr wrote:
    >
    > > On Fri, 7 Aug 1998, Alex Buell wrote:
    > >
    > > > > Next step ahead: vesafb uses the protected mode interface for palette
    > > > > changes too.
    > > >
    > > > Does it only does this on initialisation?
    > >
    > > No, for all palette changes. This should make gfx boards which have not
    > > the standard vga palette registers (MediaGX?) work with vesafb. Here is
    > > the patch (against vanilla 2.1.115).
    > >
    > > Gerd
    >
    > This patch causes me major oopsing... I have a ksymoops'ed, and raw, and
    > an strace of an offending zsh process that did it. Every time I tried to
    > do a history search, it oopsed. Sometimes oopsed maniacally on shutdown.

    What does vesafb say at startup?

    > >>EIP: c018839f <write_chan+14f/1e8>
    > Trace: c011bc4e <handle_mm_fault+c2/148>
    > Trace: c0179839 <tty_write+10d/15c>
    > Trace: c018839f <write_chan+14f/1e8>
    > Trace: c0124f50 <sys_write+c0/124>
    > Trace: c010a9c0 <system_call+34/38>

    No fbcon here. Hmm, maybe the patch triggers some race in tty/console
    code?

    Gerd


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