Bug#689268: Intel HD 4000 (Ivy Bridge) graphics freeze

[Ingo <ingo.steiner@gmx.net>]

Am 05.10.2012 23:53, schrieb Jonathan Nieder:
> Per Foreby wrote:
> 
>> So far I'm running whith the default wheezy kernel but with the iGPU memory
>> set to 256 MB. My plan was to run with this setting, and if I had another
>> crash, try the experimental kernel.
> 
> That seems like a good plan.
> 

With me all is still fine since 1 week, however that does not mean its
fixed. I am right now trying to stress my machine with high memory loads
and graphics to verify the workaround.

So far we have only 2 common things in all cases:

a) it happens when browsing with iceweasel -  Javier can you also
confirm this?

b) appears to be hardware/BIOS dependent and we all have > 4GiB RAM
installed.

There obviously is different memory allocvation/interpretation,
depending from where you gather the information:

physical RAM installed
8GiB = 8.192MiB = 8.388.608 kiB

cat /proc/mtrr
reg00: base=0x000000000 (    0MB), size= 8192MB, count=1: write-back
reg01: base=0x200000000 ( 8192MB), size=  512MB, count=1: write-back
reg02: base=0x0e0000000 ( 3584MB), size=  512MB, count=1: uncachable
reg03: base=0x0dc000000 ( 3520MB), size=   64MB, count=1: uncachable
reg04: base=0x0db800000 ( 3512MB), size=    8MB, count=1: uncachable
reg05: base=0x21f800000 ( 8696MB), size=    8MB, count=1: uncachable
reg06: base=0x21f600000 ( 8694MB), size=    2MB, count=1: uncachable

cat /proc/meminfo
MemTotal:        8095128 kB
MemFree:         7543424 kB
Buffers:           37428 kB
Cached:           285136 kB
SwapCached:            0 kB
Active:           178696 kB
Inactive:         280040 kB
Active(anon):     136512 kB
Inactive(anon):    68272 kB
Active(file):      42184 kB
Inactive(file):   211768 kB
Unevictable:           0 kB
Mlocked:               0 kB
SwapTotal:             0 kB
SwapFree:              0 kB
Dirty:                28 kB
Writeback:             0 kB
AnonPages:        136164 kB
Mapped:            58996 kB
Shmem:             68620 kB
Slab:              37120 kB
SReclaimable:      16488 kB
SUnreclaim:        20632 kB
KernelStack:        2096 kB
PageTables:        16172 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     4047564 kB
Committed_AS:     712296 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      367656 kB
VmallocChunk:   34359368791 kB
HardwareCorrupted:     0 kB
AnonHugePages:         0 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:       49152 kB
DirectMap2M:     8247296 kB

It would also be interesting whether Javier
gets a mtrr with write-combining with the new kernel and
whether BIOS settings for videoRAM are respected by the i915 module.

Ingo