8 Sep
2001
8 Sep
'01
9:58 a.m.
On Fri, 7 Sep 2001, François Gouget wrote:
I had a report of a crash and it turned out to happen during the
XVidMode initialization.
What happened is that for some unknown reason XF86VidModeGetAllModeLines
returned a single mode with a width and/or height of zero
(htotal/vtotal). This caused a division by zero in convert_modeline.
Last time this happened, we considered this a bug in the X server, as
under these circumstances, xvidtune also crashes.
Then will come the work of trying to reproduce the
problem and see
how best to deal with this server (XFree86-SVGA 4.1.0 apparently).
I don't think such a server exists. There's either XFree86 4.x with
loadable driver modules, or there's XFree86-SVGA 3.x. The latter sounds
more likely to have this kind of bug.
8 Sep
8 Sep
7:45 p.m.
New subject: Option to disable XVidMode
On Sat, 8 Sep 2001, Ove Kaaven wrote:
Yes, I meant the SVGA driver of XFree86 4.1.0 (from Debian SID). I
was explained that this is so because the laptop's graphics card is not
supported by an accelerated driver.
--
Francois Gouget fgouget(a)free.fr http://fgouget.free.fr/
Hiroshima '45 - Czernobyl '86 - Windows '95
On Fri, 7 Sep 2001, François Gouget wrote:
It might still be nice to automatically detect such buggy drivers and
then either completely disable XVidMode, or ignore such modelines. Can
we get three modelines with just one such invalid modeline in the
middle? In the example I got there was only one modeline anyway.
I had a report of a crash and it turned out to happen during the
XVidMode initialization.
What happened is that for some unknown reason XF86VidModeGetAllModeLines
returned a single mode with a width and/or height of zero
(htotal/vtotal). This caused a division by zero in convert_modeline.
Last time this happened, we considered this a bug in the X server, as
under these circumstances, xvidtune also crashes. Then will
come the work of trying to reproduce the problem and see
how best to deal with this server (XFree86-SVGA 4.1.0 apparently).
I don't think such a server exists. There's either XFree86 4.x with
loadable driver modules, or there's XFree86-SVGA 3.x. The latter sounds
more likely to have this kind of bug.
8:02 p.m.
New subject: Option to disable XVidMode
On Sat, 8 Sep 2001, Francois Gouget wrote:
That still doesn't exist.
ovek@acroyali:~$ ls /usr/X11R6/lib/modules/drivers
apm_drv.o fbdev_drv.o neomagic_drv.o tdfx_drv.o
ark_drv.o glide_drv.o nv_drv.o tga_drv.o
ati_drv.o glint_drv.o r128_drv.o trident_drv.o
atimisc_drv.o i128_drv.o radeon_drv.o tseng_drv.o
chips_drv.o i740_drv.o rendition_drv.o vesa_drv.o
cirrus_alpine.o i810_drv.o s3virge_drv.o vga_drv.o
cirrus_drv.o imstt_drv.o savage_drv.o vmware_drv.o
cirrus_laguna.o linux siliconmotion_drv.o
cyrix_drv.o mga_drv.o sis_drv.o
There's no svga driver there. However...
ovek@acroyali:~$ apt-cache show xserver-svga
Package: xserver-svga
Priority: optional
Section: x11
Installed-Size: 3236
Maintainer: Branden Robinson <branden(a)debian.org>
Architecture: i386
Source: xfree86v3
Version: 3.3.6-38
Replaces: xbase (<< 3.3.2.1-1)
Provides: xserver
Depends: debconf, xserver-common-v3 (>= 3.3.6-17), libc6 (>= 2.2.1-2),
zlib1g (>= 1:1.1.3)
Filename: pool/main/x/xfree86v3/xserver-svga_3.3.6-38_i386.deb
Size: 1350144
MD5sum: 0a96d8350bd9fe9a0ca0f2ef67d51f0c
Description: X server for SVGA graphics cards
does exist in Debian sid, mostly for users with cards not supported by
XFree86 4.x - but it's clearly 3.3.6, not 4.1. All the XF86 4.x stuff is
in xserver-xfree86.
It might still be nice to automatically detect such
buggy drivers and
then either completely disable XVidMode, or ignore such modelines. Can
we get three modelines with just one such invalid modeline in the
middle? In the example I got there was only one modeline anyway.
I think a buggy driver is likely to give invalid data for all modelines.
I don't
think such a server exists. There's either XFree86 4.x with
loadable driver modules, or there's XFree86-SVGA 3.x. The latter sounds
more likely to have this kind of bug.
Yes, I meant the SVGA driver of XFree86 4.1.0 (from Debian SID).
8289
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2 comments
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participants (2)
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Francois Gouget -
Ove Kaaven