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Bug 195802 - X.org on i855 "Error in I830WaitLpRing()": X crashes, takes out DRM
X.org on i855 "Error in I830WaitLpRing()": X crashes, takes out DRM
Product: Fedora
Classification: Fedora
Component: xorg-x11-drv-i810 (Show other bugs)
All Linux
medium Severity medium
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Assigned To: X/OpenGL Maintenance List
Depends On:
Blocks: FC6Target
  Show dependency treegraph
Reported: 2006-06-17 17:54 EDT by James Ettle
Modified: 2008-05-13 07:16 EDT (History)
0 users

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2006-06-28 02:34:03 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
X.org log showing the problem (64.73 KB, text/plain)
2006-06-17 17:54 EDT, James Ettle
no flags Details

External Trackers
Tracker ID Priority Status Summary Last Updated
FreeDesktop.org 4353 None None None Never

  None (edit)
Description James Ettle 2006-06-17 17:54:11 EDT
Description of problem:
X crashes and one must restart the machine. Logs show "Error in I830WaitLpRing()".

Version-Release number of selected component (if applicable):
Intel i855 graphics

How reproducible:

Steps to Reproduce:
1. Try running an acceleration-heavy application (e.g., something OpenGL or
XV?). In this particular instance, happened immediately on resume from S3 sleep,
but I've seen it happen when just opening an application or watching a video.
Actual results:
X server crashes, leaving a message 

Error in I830WaitLpRing(), now is -470411049, start is -470413050
pgetbl_ctl: 0x1ffe0001 pgetbl_err: 0x0
ipeir: 0 iphdr: 2000001
LP ring tail: 38 head: 0 len: 1f001 start 0
eir: 0 esr: 0 emr: ffff
instdone: efc1 instpm: b
memmode: 108 instps: 42
hwstam: ffff ier: 82 imr: 9 iir: 20
space: 131008 wanted 131064
(II) I810(0): [drm] removed 1 reserved context for kernel
(II) I810(0): [drm] unmapping 8192 bytes of SAREA 0xdebe6000 at 0xb7f1e000

Fatal server error:

in the X.org logfile. The server restarts, but keeps crashing. Machine must be

Expected results:
No crashes.

Additional info:
I've seen this before on FC4. It may even be a know issue (see linked bug to

Found in the kernel logs:

Jun 17 22:46:28 harmony kernel: [drm:i915_wait_irq] *ERROR* i915_wait_irq: EBUSY
-- rec: 256126 emitted: 256128
Comment 1 James Ettle 2006-06-17 17:54:11 EDT
Created attachment 131115 [details]
X.org log showing the problem
Comment 2 Mike A. Harris 2006-06-27 11:21:00 EDT
I believe this is a multiple reported duplicate, although I do not have the
duplicate bug ID's handy currently.
Comment 3 Mike A. Harris 2006-06-28 02:34:03 EDT
The upstream report has a lot of activity, so we'll track this upstream, and
when a fix becomes available, we'll review it for consideration in a future

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