PATCH: i830: Fix int10 calls creating nasty log messages

[Alan Hourihane]

On Tue, Feb 08, 2005 at 03:05:56AM -0800, David Bronaugh wrote:
> Alan Hourihane wrote:
> 
> >On Mon, Feb 07, 2005 at 06:54:45PM -0800, David Bronaugh wrote:
> > 
> >
> >>Hey all,
> >>
> >>Hardware: Panasonic R1N laptop, i830 video.
> >>
> >>I tracked down and have a patch for the following appearing in my logs:
> >>
> >>(EE) I810(0): unknown reason for exception
> >>(II) I810(0): EAX=0x00005f1c, EBX=0x00000000, ECX=0x00000000, 
> >>EDX=0x00000098
> >>(II) I810(0): ESP=0x00000fac, EBP=0x00000fdc, ESI=0xffff1415, 
> >>EDI=0x00002000
> >>(II) I810(0): CS=0xc000, SS=0x0100, DS=0x0000, ES=0x0000, FS=0x0000, 
> >>GS=0x0000
> >>(II) I810(0): EIP=0x000040c6, EFLAGS=0x00033046
> >>(II) stack at 0x00001fac:
> >>00 00 00 00 42 41 02 32 98 00 00 00 00 00 15 14
> >>07 00 00 00 26 3e 1c 5f 1e 14 07 00 66 33 00 00
> >>00 00 ee 18 1c 5f 45 80 ff ff ff ff ff ff ff ff
> >>40 00 00 00 00 00 00 20 00 00 00 00 00 00 98 00
> >>00 00 00 00 00 00 00 00 00 00 1c 5f 00 00 00 06
> >>00 00 00 32
> >>(II) I810(0): code at 0x000c40c6:
> >>8a 06 eb 0e 80 fd 01 75 05 67 8b 06 eb 04 67 66
> >>8b 06 5b 1f c3 52 eb 11 52 8b 16 63 04 eb 0a 52
> >>(EE) I810(0): cannot continue
> >>(WW) I810(0): Extended BIOS function 0x5f1c not supported.
> >>
> >>It seems that at least with the BIOS I have, trying to call BIOS 
> >>functions (at least SetBIOSPipe) while the overlay is active results in 
> >>a GPF, which is the exception reported above. mplayer does this. Bad 
> >>mplayer.
> >>
> >>My patch simply doesn't allow this to happen. Is there a better way to 
> >>handle this case?
> >>   
> >>
> >
> >Does this patch work David ?
> >
> >Alan.
> > 
> >
> I applied your patch; it still blows up. I think that would -probably- 
> disprove the theory of the BIOS call conflicting with the overlay being 
> enabled, but I'm still not totally sure (haven't traced the code; it's 
> late).
> 
> Earlier (prior to your patch), I tried running I830Sync right at the 
> beginning of the power management func; the problem still occurs when 
> this is done. The theory there was that perhaps the BIOS is using 
> immediate-mode rendering whereas everything else is going through the 
> ring buffer; does I830Sync do what I think it does (ie idle the chip)?

Try moving this file out of the way...

/usr/X11R6/lib/modules/linux/libint10.a

which will cause the Xserver to use this one instead.

/usr/X11R6/lib/modules/libint10.a

which is using the x86 emulator.

That might work.

Alan.