Bug 45066 - 'failed to set mtrr: No space left on device' is printed on some systems during xorg startup
Summary: 'failed to set mtrr: No space left on device' is printed on some systems duri...
Alias: None
Product: xorg
Classification: Unclassified
Component: Lib/pciaccess (show other bugs)
Version: unspecified
Hardware: x86 (IA32) FreeBSD
: medium major
Assignee: Adam Jackson
QA Contact: Xorg Project Team
Whiteboard: 2012BRB_Reviewed
Depends on:
Reported: 2012-01-21 20:03 UTC by Yuri
Modified: 2018-08-10 20:18 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:


Description Yuri 2012-01-21 20:03:41 UTC
I find this message in kdm.log on FreeBSD-9.0 when I try to start kde4.

Investigating a bit, I got this information:

This message is printed by package libpciaccess-0.12.1, file
src/freebsd_pci.c in it. Rebuilding this package doesn't help.

The error 'failed to set mtrr: No space left on device' results from
system call ioctl(fd, MEMRANGE_SET, &mro) @ freebsd_pci.c:146.
fd there is the fd for /dev/mem
Parameters of this ioctl call are (mro.r.mr_base=40000000
mro.r.mr_len=10000000 mro.r.mr_flags=2 mro.r.mr_owner="pciacces"
mro.mo_arg[0]=0 mro.mmo_arg[1]=0)

This system only has 1GB memory, mr_base=40000000 is already at 1GB, so
mr_len=10000000 makes it out of range? That's why it maybe failed.

This issue is also mentioned in FreeBSD PR#ports/164350

Comment 1 Jeremy Huddleston Sequoia 2012-06-12 03:33:41 UTC
ajax, can you take a look at this.
Comment 2 Adam Jackson 2012-07-19 22:32:51 UTC
I'm not a FreeBSD person, but I'd expect -ENOSPC to mean that you're already out of MTRRs.
Comment 3 Matthieu Herrb 2012-08-12 17:24:06 UTC
Seeing that too on OpenBSD with a thinkpad X220. I confirm that it's caused by the MTRR table beeing full already (filled by BIOS) when starting X.
Comment 4 GitLab Migration User 2018-08-10 20:18:32 UTC
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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