| Summary: | KMS:X700:M26 resume from suspend/hibernate fails to initialise LVDS | ||||||||||||||||
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| Product: | xorg | Reporter: | Tormod Volden <bugzi11.fdo.tormod> | ||||||||||||||
| Component: | Driver/Radeon | Assignee: | xf86-video-ati maintainers <xorg-driver-ati> | ||||||||||||||
| Status: | RESOLVED FIXED | QA Contact: | Xorg Project Team <xorg-team> | ||||||||||||||
| Severity: | normal | ||||||||||||||||
| Priority: | medium | CC: | pedretti.fabio | ||||||||||||||
| Version: | unspecified | ||||||||||||||||
| Hardware: | Other | ||||||||||||||||
| OS: | All | ||||||||||||||||
| Whiteboard: | |||||||||||||||||
| i915 platform: | i915 features: | ||||||||||||||||
| Attachments: |
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I should mention that this is a huge step forward from some months ago, when resuming with KMS would just give a dead screen/laptop with no backlight. Created attachment 31541 [details]
regmatch '*' after boot
Created attachment 31542 [details]
reg dump after hibernation
Created attachment 31543 [details]
reg dump after suspend
I see the screen goes funny (green or blooming) before power goes off, in the case of hibernation before the long write-to-disk. Created attachment 31571 [details] [review] pull in lvds misc mode info This patch makes sure to pull in the misc mode info for lvds (syn polarity, etc.). Created attachment 31572 [details] [review] fix LVDS setup on r4xx chips R4xx mobility chips use atombios, which does not store the LVDS_GEN_CNTL parameter setup like combios; rather, it's configured on fly in LVDSEncoderControl. As such, LVDS_GEN_CNTL is set wrong on resume. Call LVDSEncoderControl to set it properly. This patch should fix the issue. Another thing to try would be to try the r4xx_atom module option; this forces the use of atom calls to set modes on r4xx cards. Thanks! With the two patches it works perfectly. Using the r4xx_atom module option did not work, the screen got extremely fuzzy (horizontal flicker). Fixed in 2.6.33. |
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Created attachment 31540 [details] Xorg.0.log After resume from suspend or hibernate the screen is green with some very wrong x resolution or blooming with flicker. I ran radedontool regmatch and compared before and after, and when I manually regset LVDS_GEN_CNTL 0x003c00a5 the screen comes back and everything is fine. Latest git of DDX. The Ubuntu 2.6.32-5.6-generic kernel is based on 2.6.32-rc8.