Created attachment 44994 [details]
Xorg.0.log

Just tried to install Fedora 18 which has X.Org 1.13 (whatever it may be, as the X.Org site has no such release) and it fell miserably with SIGSEGV. As some investigation showed, in 1.12 releases the X.Org has dropped XAA whatsoever and now the SiS driver is trying to use EXA... which is broken... and it fails. 

Can't believe this has been reported 2 years ago and there isn't even a single comment from X.org/Freedesktop... Obviously, they're good in dropping things out and not so good in creating working things. 

So, this is to confirm: the bug is still there, wild and furious.

The Bug also exists ins Opensuse 12.3

hi
I have actually fixed this issue sometime ago.

diff -Nuarp xf86-video-sis-0.10.7/src/sis310_accel.c xf86-video-sis-0.10.7.exautsdfs/src/sis310_accel.c
--- xf86-video-sis-0.10.7/src/sis310_accel.c 2012-06-06 16:47:03.000000000 +0800
+++ xf86-video-sis-0.10.7.exautsdfs/src/sis310_accel.c 2012-09-15 13:42:59.535124999 +0800
@@ -1874,7 +1874,7 @@ SiSUploadToScreen(PixmapPtr pDst, int x,
 {
  ScrnInfoPtr pScrn = xf86ScreenToScrn(pDst->drawable.pScreen);
  SISPtr pSiS = SISPTR(pScrn);
- unsigned char *dst = pDst->devPrivate.ptr;
+ unsigned char *dst = ((unsigned char *) pSiS->FbBase) + exaGetPixmapOffset(pDst);
  int dst_pitch = exaGetPixmapPitch(pDst);
 
  (pSiS->SyncAccel)(pScrn);
@@ -1882,7 +1882,7 @@ SiSUploadToScreen(PixmapPtr pDst, int x,
  if(pDst->drawable.bitsPerPixel < 8)
     return FALSE;
 
- dst += (x * pDst->drawable.bitsPerPixel / 8) + (y * src_pitch);
+ dst += (x * pDst->drawable.bitsPerPixel / 8) + (y * dst_pitch);
  while(h--) {
     SiSMemCopyToVideoRam(pSiS, dst, (unsigned char *)src,
     (w * pDst->drawable.bitsPerPixel / 8));
@@ -1953,9 +1953,8 @@ SiSDownloadFromScreen(PixmapPtr pSrc, in
 {
  ScrnInfoPtr pScrn = xf86ScreenToScrn(pSrc->drawable.pScreen);
  SISPtr pSiS = SISPTR(pScrn);
- unsigned char *src = pSrc->devPrivate.ptr;
+ unsigned char *src = ((unsigned char *) pSiS->FbBase) + exaGetPixmapOffset(pSrc);
  int src_pitch = exaGetPixmapPitch(pSrc);
- int size = src_pitch < dst_pitch ? src_pitch : dst_pitch;
 
  (pSiS->SyncAccel)(pScrn);
 
@@ -1964,7 +1963,8 @@ SiSDownloadFromScreen(PixmapPtr pSrc, in
 
  src += (x * pSrc->drawable.bitsPerPixel / 8) + (y * src_pitch);
  while(h--) {
-    SiSMemCopyFromVideoRam(pSiS, (unsigned char *)dst, src, size);
+    SiSMemCopyFromVideoRam(pSiS, (unsigned char *)dst, src,
+      (w * pSrc->drawable.bitsPerPixel / 8));
     src += src_pitch;
     dst += dst_pitch;
  }

reference page(chinese)
http://shuizhuyuanluo.blog.163.com/blog/static/7781812012811102554972/

(In reply to comment #4)

This patch does not work.
Xorg hangs on SIS(0): initializing int10
Xorg.log in the attacment (next comment).

Created attachment 78923 [details]
Xorg hangs on SIS(0): initializing int10

(In reply to comment #5)
> (In reply to comment #4)
> 
> This patch does not work.
> Xorg hangs on SIS(0): initializing int10
> Xorg.log in the attacment (next comment).


my patch was only tested on my old box, sis661 chip.
gentoo
xorg server 1.13.0
X crashed on exa code at startup, and the patch just fixed it.
I don't have any other sis chip machines, so I can not test it more.
anyway, I think my patch may be helpful here.

btw: the motherboard of my old box was broken some months ago. any deeper investigation is now impossible for me  :(

Just in case someone hits this bug.

There exists a patch solving the issue for most modern SiS and XGI chips, and the bug is fixed for Ubuntu Trusty. See the discussion here: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-sis/+bug/1066464.

Oh, missed #4 somehow. But that patch is working for me and many others using XGI cards, according to comments in launchpad discussion.

Patch from #4 (the one used in Ubuntu Trusty) works for me too. I use Travelmate 2310.

lspci output:
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 661FX/M661FX/M661MX Host (rev 11)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] AGP Port (virtual PCI-to-PCI bridge)
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS963 [MuTIOL Media IO] LPC Controller (rev 25)
00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2/3 SMBus controller
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 IDE Controller
00:02.6 Modem: Silicon Integrated Systems [SiS] AC'97 Modem Controller (rev a0)
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] SiS7012 AC'97 Sound Controller (rev a0)
00:03.0 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.1 USB controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.3 USB controller: Silicon Integrated Systems [SiS] USB 2.0 Controller
00:04.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900 PCI Fast Ethernet (rev 91)
00:06.0 CardBus bridge: Texas Instruments PCI1410 PC card Cardbus Controller (rev 02)

Connor removed these functions in this commit [1]. He can probably confirm that this bug should be fixed.

[1] http://cgit.freedesktop.org/xorg/driver/xf86-video-sis/commit/?id=e834b2cdaedccff5e13cef86af23e46992c2530a

Yes, removing them is essentially the same as nihui's fix since Upload / Download stuff will now be done by EXA itself. Eugenij should open a sparate bug if needed because I don't see how int10 and EXA are related.