This is very similar to earlier bug 47271, except an even later bios updated then broke it again. So this is the sequence of events:
* Old bios : old kernel == works
* bios upgrade (VBIOS 2132) : old kernel == broken
* kernel upgrade (backport f47166d2) == fixed
* bios upgrade == broken
* kernel upgrade (3.2 or later) == works
We would like help identify which kernel commit fixes the problem again so that we can backport to 3.0. The interesting thing is if we _revert_ f47166d2 in the 3.0-stable branch with the latest bios, it works again. There is also a lot of info in the ubuntu bug. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1041315
This is only a bug in the 3.0 stable series, introduced by commit f47166d2 in bug 47271.
This is very similar to earlier bug 47271, except an even later bios updated then broke it again. So this is the sequence of events:
* Old bios : old kernel == works
* bios upgrade (VBIOS 2132) : old kernel == broken
* kernel upgrade (backport f47166d2) == fixed
* bios upgrade == broken
* kernel upgrade (3.2 or later) == works
We would like help identify which kernel commit fixes the problem again so that we can backport to 3.0. The interesting thing is if we _revert_ f47166d2 in the 3.0-stable branch with the latest bios, it works again. There is also a lot of info in the ubuntu bug. https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/1041315
This is only a bug in the 3.0 stable series, introduced by commit f47166d2 in bug 47271.
Diff in the regdump:
2c2 TIME: 0x00000000 TIME: 0xf5d8388f
< GEN6_INSTDONE_1: 0xfffffffe
---
> GEN6_INSTDONE_1: 0x00000000
14c14
< PIPEACONF: 0xc0000054 (enabled, active, 6bpc)
---
> PIPEACONF: 0xc0000050 (enabled, active, 6bpc)
34c34
< DSPASURF: 0x0096b000
---
> DSPASURF: 0x04830008
169c169
< PCH_PP_CONTROL: 0x00000003 (blacklight disabled, power down on re=
set, panel on)
---
> PCH_PP_CONTROL: 0xabcd0003 (blacklight disabled, power down on re=
set, panel on)
174,175c174,175
< RC6_RESIDENCY_TIME: 0x0001b916
< RC6p_RESIDENCY_
---
> RC6_RESIDENCY_TIME: 0x00331e26
> RC6p_RESIDENCY_