Messages in this thread | | | Subject | Re: Faulty MTRR setups in Toshiba laptops crash video drivers | From | Mehmet Giritli <> | Date | Tue, 03 Nov 2009 15:08:33 +0200 |
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On Mon, 2009-11-02 at 18:06 -0600, Robert Hancock wrote: > On 11/02/2009 10:28 AM, Mehmet Giritli wrote: > > Hello all, > > > > On some laptops using ATI 3650HD radeon chipsets and 4GB ram (and may be > > others as well), it is impossible to start any xserver due to (faulty?) > > mtrr setups on the machine. The computer locks up or just gives an > > unresponsive black screen. There are various drivers for radeon cards > > and the crash occurs in all of these drivers in the very same way! > > > > This bug seems to occur mostly on Toshiba laptops with ATI graphic > > cards. For some people, CONFIG_MTRR_SANITIZER seemed to cure the issue > > but made no difference for many others like me. > > > > RadeonHD people seem to have problems in understanding the nature of > > this bug. Please have a look at the threads: > > > > http://lists.opensuse.org/radeonhd/2009-05/msg00040.html > > > > and, > > > > http://bugs.freedesktop.org/show_bug.cgi?id=20645 > > > > for problem reports and dev responses. RadeonHD devs suggest that some > > laptops have weird mtrr setups and this must be fixed in the kernel code > > and not the driver code. > > Unfortunately I don't see enough details to be able to tell what lead > them to this conclusion. Can you post the output of: > > lspci -vv > cat /proc/mtrr
lspci -vv http://bugzilla.kernel.org/attachment.cgi?id=23634
/proc/mtrr when 4GB installed http://bugzilla.kernel.org/attachment.cgi?id=23632
/proc/mtrr when 2GB installed http://bugzilla.kernel.org/attachment.cgi?id=23633
There is also a bug report that I opened a while back here: http://bugzilla.kernel.org/show_bug.cgi?id=14054
> > > > > Currently, the only way that could make the driver work is to reduce the > > 4GB ram to 2GB. > > > > dmesg from my affected machine when it has 4GB ram installed can be > > found here: > > > > http://bugzilla.kernel.org/attachment.cgi?id=22856 > > > > Also, look at the report here: > > > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/341681 > > > > in order to see how many people are being affected by this bug! > > > > Kind Regards, > > M. Giritli > > > > >
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