Created attachment 21571 [details]
Crashed boot process with activated kms
Since kernel 2.6.30-rc6 the boot process hangs when kms is activated.
Kernel 2.6.30-rc5 never had problems with activated kms.
Magic key sequence is not working. Only pressing the power button for 4 seconds or removing the power work.
Created attachment 21572 [details]
Successful boot with kms
Created attachment 21573 [details]
Created attachment 21574 [details]
kernel configuration of 2.6.30-rc5
Could you git bisect the issue?
I tried to bisect the issue. But unfortunately it fails, because of a reiserfs bug after rc5 which causes the kernel crashing when it mounts the root fs.
But I've found the reason for this issue. I remembered that I compiled rc5 with a slightly different config than rc6. In rc6 I had enabled more debugging options and also the kdbg. Looking at the kernel messages when it stopped booting I saw that the last outputs always came from kdbg.
Then I disabled kdbg and the additional debugging options in the current master. Now the issue seems to be gone. I've bootet the kernel several times without any problems.
Btw. I compiled rc5 with the same options as rc6 and rc7 and it showed the same issues.
Notify-Also : Eric Anholt <email@example.com>
Sounds like a kgdb issue then...
On Sunday 07 June 2009, Martin Bammer wrote:
> Since i disabled most of the debug options this problem has gone. IMHO
> this issue has been caused by kdbg.
Dropping from the list of recent regressions as per comments #8 and #9.
So can we close this one?
Yes this bug can be closed.