| Summary: | 2.6.31-rc3: LVDS gets re-enabled after resume | ||||||||||||||
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| Product: | xorg | Reporter: | pittipatti | ||||||||||||
| Component: | Driver/intel | Assignee: | Jesse Barnes <jbarnes> | ||||||||||||
| Status: | RESOLVED FIXED | QA Contact: | Xorg Project Team <xorg-team> | ||||||||||||
| Severity: | normal | ||||||||||||||
| Priority: | medium | Keywords: | NEEDINFO, regression | ||||||||||||
| Version: | 7.4 (2008.09) | ||||||||||||||
| Hardware: | Other | ||||||||||||||
| OS: | All | ||||||||||||||
| Whiteboard: | |||||||||||||||
| i915 platform: | i915 features: | ||||||||||||||
| Attachments: |
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Created attachment 31009 [details]
uname -a
Created attachment 31010 [details]
dmesg
Created attachment 31011 [details]
xrandr query after resume
Hi pittipatti, Do you happen to know if this bug was introduced in a recent kernel revision? If so, we may be able to bisect the kernel to find the bad commit. Thanks, -Carl I just tried different versions and found that this bug was introduced with version 2.6.31-rc3. With rc2 the LVDS stays of after resuming. (In reply to comment #5) > I just tried different versions and found that this bug was introduced > with version 2.6.31-rc3. > With rc2 the LVDS stays of after resuming. Thanks for the additional information. This sounds like a bug that's in Jesse's area, (or if no he might know who can handle it best), so I'll assign it to him. -Carl Ah yeah, we may force LVDS back on now that we listen for lid events (which are sometimes generated at resume). I'll have to come up with a better way of restoring the suspend config by ignoring spurious enables at resume. Does this still occur with 2.6.33-rc kernels? We may need to add a quirk for your lid if it's generating spurious events. Please attached the output of dmidecode to this bug. I just tested with 2.6.33-rc6 and it just works fine, so the bug can be closed. for the sake of completeness I'll however attach the dmidecode info. Created attachment 33127 [details]
dmidecode
Thanks for the update. |
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Created attachment 31008 [details] lspci -vnvn On my Samsung Q45 with Intel GM965 graphics I encounter the following problem when using KMS: After a suspend/resume cycle the internal LVDS always gets enabled, whether it was on before or not. State before suspend/resume: LVDS: off / VGA: 1600x1200 State after resuming from suspend: LVDS: 1280x800 / VGA: 1600x1200 "xrandr --query" reports that the LVDS is off and it is not possible to turn it off by issuing "xrandr --output LVDS --off" To finally turn the LVDS off it needs to be "enabled" first by using "xrandr ... --auto". Afterwards it is possible to really turn it off. Expected behavior: - LVDS stays off after resume when it was off before Sidenote: If the displays are configured the other way round (VGA off/LVDS on) a suspend/resume cycle does not enable the VGA output.