Ubuntu 8.10 Alpha3 boot fail on SB700A12 platform

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2. Please run the command "dmesg > dmesg.log" after a fresh boot and attach the resulting file "dmesg.log" to this bug report.
3. Please run the command "sudo lspci -vvnn > lspci-vvnn.log" and attach the resulting file "lspci-vvnn.log" to this bug report.

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lspci.out: platform related to SB700 A12 has this issue
dmesg.out: system boot hang on early stage on dmesg can be dumpped
Kernel name: Ubuntu 8.10 Alpha3
uname -a: Linux crane-desktop 2.6.26-4-generic ...

Got some update that this issue has not been seen on Hardy, yet. Only Intrepid alpha.

Fix has been commited to Intrepid tree as 057bfcbca5e9190afedb12339ecb67ed778a30c8
UBUNTU: SAUCE: x86: HPET rework for SB700

This bug was fixed in the package linux - 2.6.26-5.16

---------------
linux (2.6.26-5.16) intrepid; urgency=low

  [ Ben Collins ]

  * Revert "SAUCE: toshiba_acpi: Rewrote most of the proc entry bits."
  * Revert "SAUCE: Update toshiba_acpi.c to version 0.19a"
  * build/config: Disable in-kernel toshiba driver(s)
  * ubuntu/tlsup: New driver for toshiba laptops
  * build/config: Enable TLSUP driver
  * SAUCE: e1000e: Fix E1000E_ENABLED logic to check for our E1000E_NEW
    driver as well
  * ubuntu/e1000e: Remove E1000E_ENABLED option in local config
  * build/config: Update configs to have E1000E_ENABLED set
  * ubuntu/prism2: Remove duplicate device

  [ Fabio M. Di Nitto ]

  * SAUCE: Export gfs2 symbols required for gfs1 kernel module

  [ Stefan Bader ]

  * SAUCE: x86: HPET rework for SB700
    - LP: #255910

  [ Tim Gardner ]

  * Add GNBD driver
  * Enable GNBD driver
  * SAUCE: Add GFS driver
  * SAUCE: Enable gfs driver configs
  * b43: Linksys WMP54G (BCM4306/3) card in a PCI format has an SPROM
    coding

  [ Upstream Kernel Changes ]

  * KVM: x86 emulator: emulate clflush
  * USB: quirk PLL power down mode

 -- Ben Collins <email address hidden> Mon, 11 Aug 2008 13:19:28 -0400

kernel main stream (now in tip git and later will be merged in main stream in v2.6.27) accept a revised patch:
http://git.kernel.org/?p=linux/kernel/git/x86/linux-2.6-tip.git;a=commit;h=a6825f1c1fa83b1e92b6715ee5771a4d6524d3b9

You may withdraw it as soon as you merge new kernel main stream.

X86_32->CONFIG_HPET_TIMER default is N -> hpet.o will not compiled in -> early-quirk source code do not need.

You can refine it as this:

diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c index 5f6f543..f976650 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -98,12 +98,14 @@ static void __init nvidia_bugs(int num, int slot, int func)

 static void __init amd_sb700_hpet(int num, int slot, int func) {
+#ifdef CONFIG_HPET_TIMER
  int rev;
  rev = read_pci_config_byte(num, slot, func, 0x08);
  if (rev <= 0x3a && rev >= 0x30) {
   sb700_hpet_workaround = 1;
   printk(KERN_INFO "SB700 rev 0x3a or lower detected!\n");
  }
+#endif
 }

 #define QFLAG_APPLY_ONCE 0x1