Public bug reported: Binary package hint: xserver-xorg-video-intel
Problem: If I disable font antialiasing and attempt to access http://launchpadlibrarian.net/29956668/crash.html in firefox my xserver aborts. This should not happen. The webpage should simply display the words "GOODBYE WORLD!" in very large text. Note: text does not need to be very large. For example http://joe- editor.sourceforge.net/ also triggers the bug. Description: Ubuntu 10.10 Release: 10.10 xserver-xorg-video-intel: Installed: 2:2.12.0-1ubuntu5.1 Candidate: 2:2.12.0-1ubuntu5.1 Version table: *** 2:2.12.0-1ubuntu5.1 0 500 http://gb.archive.ubuntu.com/ubuntu/ maverick-updates/main i386 Packages 100 /var/lib/dpkg/status 2:2.12.0-1ubuntu5 0 500 http://gb.archive.ubuntu.com/ubuntu/ maverick/main i386 Packages Backtrace: #0 0x00681416 in __kernel_vsyscall () No symbol table info available. #1 0x00298941 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64 resultvar = <value optimised out> pid = 3960820 selftid = 1949 #2 0x0029be42 in abort () at abort.c:92 act = {__sigaction_handler = {sa_handler = 0x468, sa_sigaction = 0x468}, sa_mask = {__val = {3966032, 120, 3965888, 3960820, 3965888, 108, 3212918176, 3010141, 198339232, 3960820, 3960820, 109, 3212918376, 2944968, 198339336, 198339336, 108, 198339232, 0, 4222451712, 198339336, 198339437, 198339336, 198339336, 198339444, 198339636, 198339336, 198339636, 0, 0, 0, 0}}, sa_flags = 0, sa_restorer = 0x4} sigs = {__val = {32, 0 <repeats 31 times>}} #3 0x002918e8 in __assert_fail ( assertion=0x200098 "uxa_pixmap_is_offscreen(src_pixmap)", file=0x200080 "../../uxa/uxa-glyphs.c", line=986, function=0x200124 "uxa_glyphs_via_mask") at assert.c:81 buf = 0xbd26c38 "X: ../../uxa/uxa-glyphs.c:986: uxa_glyphs_via_mask: Assertion `uxa_pixmap_is_offscreen(src_pixmap)' failed.\n" #4 0x001ef988 in uxa_glyphs_via_mask (op=3 '\003', pSrc=0xbb11b58, pDst=0xbb366a8, maskFormat=0xb2bb7f0, xSrc=8, ySrc=77, nlist=1, list=0xbf814570, glyphs=0xbf814170) at ../../uxa/uxa-glyphs.c:986 src_pixmap = 0xbd26440 src_x = 0 glyph = 0xbb34bb8 src_y = 0 priv = 0xbd26440 screen = 0x9c01750 mask = 0xbd26a48 y = 52 pixmap = 0xbd26938 width = <value optimised out> dst_off_x = 6 dst_off_y = 25 box = {x1 = 6, y1 = 25, x2 = 145, y2 = 93} component_alpha = 0 glyph_atlas = <value optimised out> x = 2 height = <value optimised out> error = 0 #5 uxa_glyphs (op=3 '\003', pSrc=0xbb11b58, pDst=0xbb366a8, maskFormat=0xb2bb7f0, xSrc=8, ySrc=77, nlist=1, list=0xbf814570, glyphs=0xbf814170) at ../../uxa/uxa-glyphs.c:1151 screen = 0x9c01750 uxa_screen = <value optimised out> xDst = 2 yDst = 198338872 extents = {x1 = 0, y1 = 0, x2 = 0, y2 = 0} width = 0 height = 0 ret = <value optimised out> localDst = 0x8 #6 0x08122ae9 in damageGlyphs (op=6 '\006', pSrc=0xbb11b58, pDst=0xbb366a8, maskFormat=0xb2bb7f0, xSrc=<value optimised out>, ySrc=<value optimised out>, nlist=1, list=0xbf814570, glyphs=0xbf814170) at ../../../miext/damage/damage.c:718 pScreen = <value optimised out> #7 0x081bea90 in CompositeGlyphs (op=0 '\000', pSrc=0xbb11b58, pDst=0xbb366a8, maskFormat=0xb2bb7f0, xSrc=<value optimised out>, ySrc=<value optimised out>, nlist=1, lists=0xbf814570, glyphs=0xbf814170) at ../../render/glyph.c:604 No locals. #8 0x0811c463 in ProcRenderCompositeGlyphs (client=0xb62e338) at ../../render/render.c:1435 glyphSet = 0xb72e468 pSrc = 0xbb11b58 pDst = 0xbb366a8 pFormat = 0xb2bb7f0 listsLocal = {{xOff = 8, yOff = 77, len = 6 '\006', format = 0xb2bb7f0}, {xOff = 0, yOff = 0, len = 0 '\000', format = 0x0} <repeats 52 times>, {xOff = 24081, yOff = 2064, len = 0 '\000', format = 0x0}, {xOff = 0, yOff = 0, len = 0 '\000', format = 0x0}, {xOff = 0, yOff = 0, len = 0 '\000', format = 0xb62e338}, {xOff = 0, yOff = 0, len = 0 '\000', format = 0x0}, {xOff = 4084, yOff = 2079, len = 8 '\b', format = 0xb303cf0}, {xOff = 18536, yOff = -16511, len = 102 'f', format = 0x8202544}, {xOff = 0, yOff = 0, len = 136 '\210', format = 0x0}, {xOff = 0, yOff = 0, len = 0 '\000', format = 0x0}, {xOff = 14369, yOff = 2055, len = 0 '\000', format = 0x0}, {xOff = 0, yOff = 0, len = 244 '\364', format = 0xb62e338}, {xOff = 9536, yOff = 2080, len = 184 '\270', format = 0x8104a2e}} lists = 0xbf81457c listsBase = 0xbf814570 glyphsLocal = {0xbb34bb8, 0xb9f2868, 0xb78ace0, 0xbaf1088, 0xbaf1088, 0xbaf1088, 0x0 <repeats 250 times>} glyph = <value optimised out> glyphs = 0xbf814188 glyphsBase = 0xbf814170 buffer = <value optimised out> end = 0xba105b0 "\225\021\003" nglyph = -1082048120 nlist = 1 space = <value optimised out> size = <value optimised out> rc = <value optimised out> #9 0x08118293 in ProcRenderDispatch (client=0x6) at ../../render/render.c:2051 No locals. #10 0x0806e087 in Dispatch () at ../../dix/dispatch.c:432 result = <value optimised out> client = 0xb62e338 nready = 0 start_tick = 260 #11 0x080625ba in main (argc=6, argv=0xbf814a04, envp=0xbf814a20) at ../../dix/main.c:291 i = 1 alwaysCheckForInput = {0, 1} Tracked bug down to uxa/uxa-glyphs.c in the xserver-xorg-video-intel driver. I looked at the latest git of the driver and knocked together the following patch which seems to work. Not sure of the quality of the code though: --- a/uxa/uxa-glyphs.c 2010-06-24 21:29:37.000000000 +0100 +++ b/uxa/uxa-glyphs.c 2010-12-31 19:51:49.000000000 +0000 @@ -164,8 +164,12 @@ INTEL_CREATE_PIXMAP_TILING_X); if (!pixmap) goto bail; - assert (uxa_pixmap_is_offscreen(pixmap)); - + if (!uxa_pixmap_is_offscreen(pixmap)) { + /* Presume shadow is in-effect */ + pScreen->DestroyPixmap(pixmap); + uxa_unrealize_glyph_caches(pScreen); + return TRUE; + } component_alpha = NeedsComponent(pPictFormat->format); picture = CreatePicture(0, &pixmap->drawable, pPictFormat, CPComponentAlpha, &component_alpha, @@ -780,9 +784,8 @@ mask_pixmap = uxa_get_drawable_pixmap(this_atlas->pDrawable); - assert (uxa_pixmap_is_offscreen(mask_pixmap)); - - if (!uxa_screen->info->prepare_composite(op, + if (!uxa_pixmap_is_offscreen(mask_pixmap) || + !uxa_screen->info->prepare_composite(op, localSrc, this_atlas, pDst, src_pixmap, mask_pixmap, dst_pixmap)) return -1; @@ -983,9 +986,8 @@ src_pixmap = uxa_get_drawable_pixmap(this_atlas->pDrawable); - assert (uxa_pixmap_is_offscreen(src_pixmap)); - - if (!uxa_screen->info->prepare_composite(PictOpAdd, + if (!uxa_pixmap_is_offscreen(src_pixmap) || + !uxa_screen->info->prepare_composite(PictOpAdd, this_atlas, NULL, mask, src_pixmap, NULL, pixmap)) return -1; ** Affects: xserver-xorg-video-intel (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. https://bugs.launchpad.net/bugs/696957 Title: Large non-antialiased text causes xserver to abort _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
