Date: Thu, 2 Jun 2005 17:10:12 +0200 From: Antoine Brodin <antoine.brodin@laposte.net> To: Antoine Brodin <antoine.brodin@laposte.net> Cc: delphij@freebsd.org, current@freebsd.org Subject: Re: Recent vesa changes Message-ID: <20050602171012.61b4568e.antoine.brodin@laposte.net> In-Reply-To: <20050602134523.7adcf516.antoine.brodin@laposte.net> References: <20050602134523.7adcf516.antoine.brodin@laposte.net>
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Antoine Brodin <antoine.brodin@laposte.net> wrote:
> Hi,
>
> The recent vesa changes cause a problem on my laptop.
> During startup, when ispcvt is called by syscons_precmd
> (in /etc/rc.d/syscons), it clears my screen and the screen keeps
> cleared.
>
> I investigated a bit, and chmod'ing -x ispcvt solves the problem.
>
> Vidcontrol -i mode shows that mode 369 is supported so I think that
> there is perhaps an ioctl collision between
> . this mode: _IO('V', 369 - 256)
> . and VGAPCVTID: _IOWR('V',113, struct pcvtid)
A quick workaround is attached
%%%
Index: scvesactl.c
===================================================================
RCS file: /home/ncvs/src/sys/dev/syscons/scvesactl.c,v
retrieving revision 1.21
diff -u -p -r1.21 scvesactl.c
--- scvesactl.c 29 May 2005 08:43:43 -0000 1.21
+++ scvesactl.c 2 Jun 2005 14:56:09 -0000
@@ -115,7 +115,9 @@ vesa_ioctl(struct cdev *dev, u_long cmd,
mode = (cmd & 0xff) + M_VESA_BASE;
- if ((mode > M_VESA_FULL_1280) &&
+ /* Avoid collisions with pcvt. */
+ if (((cmd & IOC_DIRMASK) == IOC_VOID) &&
+ (mode > M_VESA_FULL_1280) &&
(mode < M_VESA_MODE_MAX))
return sc_set_graphics_mode(scp, tp, mode);
}
%%%
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