Created attachment 140871
drm/nv50: Fix backlight not working when PWM_DIV is uninitialised (v5)
Patch modified to work with 4.17.9.
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Wrong commit, redid the bisect. 839ca903f12ef8f09374e0b655456482536a733e
is the new suspect.
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https://bugs.launchpad.net/bugs/921321
Title:
nouveau: dark scre
According to a bisect, the commit
f00f0e218b5d6347f28c0f2d80ee46c45b28f3c3 killed the patch.
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Title:
nouveau: dark scre
I got the patch working in 4.9.6. But in 4.17.3 the backlight controls
no longer work after suspend.
Wierdly though, the "nvapeek" output is the same after suspend as before:
# nvapeek 0xe100; nvapeek 0xe28c; nvapeek 0xe104 8; nvapeek 0xe280 8
e100: 001c1100
e28c: 0180
e104: 722666
Is this reverse engineering something I could do myself using software,
or does it require active fiddling with the registers?
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Created attachment 113754
drm/nv50: Fix backlight not working when PWM_DIV is uninitialised (v4)
I redid the patch for 3.18.6. Not sure what the use of removed
nvif_rd32() chunk was, but it doesn't seem to be necessary anymore.
Could this fix be predicated on the specific PCI ID if the effects ar
Not to be a nag, but multiple people have confirmed that the patch fixes
the problem. What are the prerequisites for merging this?
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I can confirm that the patch "drm/nv50: Fix backlight[...](v2)" works
for a HP 8530w. Any chance of getting this included upstream?
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