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Re: Problems with kernel-2.6.26 and 2.6.27-0.x.rc2



2008/8/29 Tom London <selinux gmail com>:
> On Thu, Aug 28, 2008 at 3:13 PM, Joshua C. <joshuacov googlemail com> wrote:
>> I have a strange problem with the 2.6.26 series kernel. 2.6.27-rc1
>> branch is ok but the same thing happens with 2.6.27.rc2 and the
>> following. 2.6.25 branch is ok.
>> I filed a bug report here https://bugzilla.redhat.com/show_bug.cgi?id=458901.
>>
>> The kernel loads fine until showing "starting udev". then it just
>> stops and cannot continue. on the 2.6.26 branch i need to keep pressed
>> atleast one key for it to continue. Then it goes further and
>> everything freezes when no key is pressed.
>> 2.6.27.rc1 was ok but the same thing showed in 2.6.27.rc2 onwards.
>> with the lastes kernel-2.6.27-0.287.rc4.git7.fc10 after "startig udev"
>> I get black and white stripps on my screen and only hardware reset
>> helps. This makes me think it is something connected with the kernel
>> modesetting and my radeon gpu. It could also be udev but it is fine
>> with 2.6.25 and if i keep at least one key pressed then 2.6.26 works
>> fine. in everycase dmesg shows nothing. What could it be? How can I
>> see where the problem is?
>>
> Could this be your problem: https://bugzilla.redhat.com/show_bug.cgi?id=455595
>
> If so, adding "modprobedebug" to the boot parameters seems to help on
> my system (not radeon).
>
> tom
> --
> Tom London
>
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>

I suspect it's Intel's GEM that is causing the problems. The kernel
boots fine until it has to initialize the devices. And in my case I
have no display. acpi=off helps me solve the problem but then lots of
devices don't work. Maybe a kernel code that deals with the device
initialisation is what's changed between 2.6.25 and 2.6.26/27 series.


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