1.5.99.3 crashes on G945: intel(0): Unable to write to SDVOCTRL_E for SDVOB Slave 0x70

After dist-upgrading Jaunty this morning, X fails to start with

(EE) intel(0): Unable to write to SDVOCTRL_E for SDVOB Slave 0x70.
(II) intel(0): EDID vendor "AOC", prod id 43393

Backtrace:
0: /usr/bin/X11/X(xorg_backtrace+0x3b) [0x813263b]
1: /usr/bin/X11/X(xf86SigHandler+0x51) [0x80c5c51]
2: [0xb7fba400]
3: /usr/bin/X11/X(xf86CrtcSetMode+0x36) [0x80ed4f6]
4: /usr/lib/xorg/modules/drivers//intel_drv.so(i830GetLoadDetectPipe+0x15d) [0xb79e734d]
5: /usr/lib/xorg/modules/drivers//intel_drv.so [0xb7a04add]
6: /usr/bin/X11/X(xf86ProbeOutputModes+0x1a0) [0x80ed8b0]
7: /usr/bin/X11/X(xf86InitialConfiguration+0x149) [0x80ee449]
8: /usr/lib/xorg/modules/drivers//intel_drv.so [0xb79ecaa9]
9: /usr/lib/xorg/modules/drivers//intel_drv.so [0xb79eef48]
10: /usr/bin/X11/X(InitOutput+0xe13) [0x80ae953]
11: /usr/bin/X11/X(main+0x1e1) [0x80717e1]
12: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7b88775]
13: /usr/bin/X11/X [0x8070e71]

Fatal server error:
Caught signal 11. Server aborting

Locally rebuilding -intel does not help. This is without an xorg.conf. I temporarily switched to vesa, which works (but is slow, of course).