John Clemens, thank you for reporting this and helping make Ubuntu
better.
As per https://wiki.ubuntu.com/Releases, Natty reached EOL on October
28, 2012.
Is this reproducible on a supported release?
** No longer affects: unity (Ubuntu)
** Changed in: mesa (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/767970
Title:
xterm font corruption and X crash with nouveau experimental 3d (not
just Unity)
Status in mesa package in Ubuntu:
Incomplete
Bug description:
Binary package hint: unity
Running FOSS/3D-nouveau drivers on Natty as of today, xterm fonts are
corrupted horribly on input (not on output).
To reproduce:
- install natty beta 2
- update all packages
- Choose "additional drivers" and "experimental FOSS/3d support"
- reboot.
- open xterm in reverse video mode 'xterm -rv' (so it's white-on-black, the
one true way)
- type into the window, all fonts will be horribly corrupted, almost just
plain white blocks. however, typing 'ls' blind, the output of ls is fine. but
type anything else at the prompt and it works.
- If not immediately, this will cause X to crash.
Update: This happens with or without Unity
This is with an NV50-based video card. My home machine with a radeon
3450 running the FOSS drivers and unity runs xterm without this issue.
Crash has this stacktrace:
Program received signal SIGSEGV, Segmentation fault.
0x00007f01e23f00e2 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) bt
#0 0x00007f01e23f00e2 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007f01e23f231e in malloc () from /lib/x86_64-linux-gnu/libc.so.6
#2 0x00007f01df964b44 in exaPrepareAccessReg_mixed (pPixmap=0x2516880,
index=0, pReg=0x0) at ../../exa/exa_migration_mixed.c:203
#3 0x00007f01df96f167 in ExaCheckImageGlyphBlt (pDrawable=0x23aef50,
pGC=0x13a5b50, x=2, y=13, nglyph=<value optimized out>,
ppci=<value optimized out>, pglyphBase=0x0) at ../../exa/exa_unaccel.c:326
#4 0x00000000004db8ab in damageText (pDrawable=0x23aef50, pGC=0x13a5b50, x=2,
y=13, count=<value optimized out>, chars=<value optimized out>,
fontEncoding=TwoD16Bit, textType=3) at ../../../miext/damage/damage.c:1486
#5 0x00000000004df4fc in damageImageText16 (pDrawable=0x23aef50,
pGC=0x13a5b50, x=2, y=13, count=<value optimized out>,
chars=<value optimized out>) at ../../../miext/damage/damage.c:1567
#6 0x000000000042ff47 in doImageText (client=0x23ad880, c=0x7fffe7caccd0)
at ../../dix/dixfonts.c:1548
#7 0x0000000000431410 in ImageText (client=<value optimized out>,
pDraw=<value optimized out>, pGC=<value optimized out>,
nChars=<value optimized out>, data=<value optimized out>,
xorg=<value optimized out>, yorg=13, reqType=77, did=71303213)
at ../../dix/dixfonts.c:1590
#8 0x000000000042b8d0 in ProcImageText16 (client=0x23ad880)
at ../../dix/dispatch.c:2320
#9 0x000000000042e2a9 in Dispatch () at ../../dix/dispatch.c:431
#10 0x0000000000421a7e in main (argc=8, argv=<value optimized out>,
envp=<value optimized out>) at ../../dix/main.c:287
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