Created attachment 21047 [details] xorg.0.log System Environment: ------------------------- Libdrm: (master)c99566fb810c9d8cae5e9cd39d1772b55e2f514c Mesa_stable: (intel-2008-q4)154a9e5317f890618932cea0129ef887e16baf84 Xserver_stable: (server-1.6-branch)523aae1fa6d8002e55e85aee49f113b7eb9a6df3 Xf86_video_intel_stable:(xf86-video-intel-2.6-branch)6ca0d7e6ff05bff2bb88bfae64c2d79ac115bd38 Bug detailed description: ------------------------- X can not start up with the latest xserver 1.6 branch,below is the position where errors happens at, and the backtrace from gdb: ************************************************** Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1210128704 (LWP 2821)] 0x080e4162 in xf86CrtcSetModeTransform (crtc=0x820fe90, mode=0xb7d79c20, rotation=1, transform=0x0, x=0, y=0) at xf86Crtc.c:300 300 if (pScreen) { ******************* backtrace: (gdb) bt #0 0x080e4162 in xf86CrtcSetModeTransform (crtc=0x820fe90, mode=0xb7d79c20, rotation=1, transform=0x0, x=0, y=0) at xf86Crtc.c:300 #1 0x080e4aa6 in xf86CrtcSetMode (crtc=0x820fe90, mode=0xb7d79c20, rotation=1, x=0, y=0) at xf86Crtc.c:420 #2 0xb7d10e82 in i830GetLoadDetectPipe (output=0x8210298, mode=0xb7d79c20, dpms_mode=0xbfe45228) at i830_display.c:1790 #3 0xb7d0b31f in i830_crt_detect (output=0x8210298) at i830_crt.c:404 #4 0x080e1ad8 in xf86ProbeOutputModes (scrn=0x820d700, maxX=2048, maxY=2048) at xf86Crtc.c:1507 #5 0x080e2621 in xf86InitialConfiguration (scrn=0x820d700, canGrow=0) at xf86Crtc.c:2207 #6 0xb7d161da in I830AccelMethodInit (pScrn=0x820d700) at i830_driver.c:1605 #7 0xb7d17a6b in I830PreInit (pScrn=0x820d700, flags=<value optimized out>) at i830_driver.c:1876 #8 0x080a5af4 in InitOutput (pScreenInfo=0x81ddac0, argc=1, argv=0xbfe456a4) at xf86Init.c:1008 #9 0x0806c17b in main (argc=1, argv=0xbfe456a4, envp=0xbfe456ac) at main.c:309 Reproduce steps: ---------------- X&
Created attachment 21048 [details] xorg.0.log
Created attachment 21049 [details] xorg conf file
we try to bisect and find below commit causes the issue: commit 991f0be6e2bfe3cc3df55b2fc75fe3900d5e0b94 Author: Maarten Maathuis <madman2003@gmail.com> Date: Sat Nov 29 14:30:55 2008 +0100 randr: Avoid needlessly creating a shadow framebuffer. - pScreen->width and height were zero, so it didn't "fit" the screen. (cherry picked from commit ffb484f7ef84099019b196ef97bfb2355eb6d52a) Signed-off-by: Keith Packard <keithp@keithp.com>
Same problem here. It works when 991f0be6e2bfe3cc3df55b2fc75fe3900d5e0b94 reverted.
Keith/Zhenyu, any idea?
And yet another confirmation, since xserver 1.6 was put to Ubuntu development version and I encountered the problem via that. Reverting the mentioned commit fixed the problem for me. Using 965 (GMA X3100) on a laptop. (downstream bug report: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/308225)
Fixed on master and server-1.6-branch. please test.
For the record, server-1.6 branch hasn't received a commit in 6 days.
(In reply to comment #7) > Fixed on master and server-1.6-branch. please test. I guess you mean this commit, but it's not on server-1.6-branch: http://cgit.freedesktop.org/xorg/xserver/commit/?id=fde2f961035609cfff8761ef1e0f23e6a9761be2 author Keith Packard <keithp@keithp.com> 2008-12-15 19:39:24 (GMT) committer Keith Packard <keithp@keithp.com> 2008-12-15 19:45:43 (GMT) commit fde2f961035609cfff8761ef1e0f23e6a9761be2 (patch) tree 767dafa52fa86df801ba831aad03a6113ab28bd6 parent 29a5b0596b396d3e4a8a014cacd3e3ef77467ab7 (diff) Use scrn->virtualX/virtualY in xf86CrtcFitsScreen. Fix bug 19017. pScreen->width/height are not initialized when doing initial mode setting, which makes this function incorrectly fail. Using scrn->virtualX should work in all cases though. Bug 19017 reports a crash in xf86CrtcSetModeTransform when doing a modeset for output probing, long before the screen array is initialized; that was caused by a work-around to set pScreen->width/height so that xf86CrtcFitsScreen could find the right values. Signed-off-by: Keith Packard <keithp@keithp.com>
sorry, forgot to push :-)
(In reply to comment #10) > sorry, forgot to push :-) > keith,the issue has gone against server 1.6 branch ,but it still exists with master.
The initial patch was broken, master needs 063eb6743cd0d98dd52d1a9559b804381ee5144d and server-1.6-branch needs 09039fb89f3fd047f10b575e019bba6762448456 I tested GM45 and GM965 on both master and server-1.6-branch and with both patches applied, both work fine.
verified against : master 7aa29b9d66c3cd0f8af4fafbe92efd0c0556d225 server 1.6 branch 063eb6743cd0d98dd52d1a9559b804381ee5144d
*** Bug 19204 has been marked as a duplicate of this bug. ***
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