FWIW this is also present in 2.6.20-14 on an Acer TM3200. Probably the i2c-ec-driver pulled in by sbs (sbs is read via ec)? In the working 2.6.20-12 I get the following warining message. At that point it hangs in 2.6.20-14. If you need further info/tests let me know.
[ 27.576000] **WARNING** I2C adapter driver [] forgot to specify physical device; fix it! [ 27.576000] ACPI: EC HC smbus [SMBC] -- Kernel 2.6.20-13 acpi bug https://bugs.launchpad.net/bugs/96480 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs