** Changed in: nouveau
Status: Incomplete => Unknown
** Bug watch added:
gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues #20
https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/20
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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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Title:
nouveau: d
According to a bisect, the commit
f00f0e218b5d6347f28c0f2d80ee46c45b28f3c3 killed the patch.
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Title:
nouveau: d
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
I have an NVAC (MCP79) in an iMac9,1 for which the backlight controls do
not work if NV50_PDISP_SOR_PWM_DIV(0x61c080) is set to 0x5e. If it is
useful at all I have attached an mmiotrace dump with from various
backlight control setting changes using the nvidia blob in another bug
report (#98677).
-
Is this reverse engineering something I could do myself using software,
or does it require active fiddling with the registers?
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(In reply to Erik Karlsson from comment #50)
> Created attachment 113754 [details] [review]
> 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 anymo
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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Created attachment 100635
drm/nv50: Fix backlight not working when PWM_DIV is uninitialised (v3)
Applying Roy's 0001-drm-nv50-Fix-backlight-not-working-when-PWM_DIV-
is-u.patch (v2) to linux-3.15-rc8 results in a compilation error.
...
CC drivers/gpu/drm/nouveau/nouveau_display.o
drivers/g
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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This bug report is being closed due to your last comment:
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** Changed in: nouveau
Status: Confirmed => Incomplete
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Title:
nouveau: dark screen after suspend/resume
Created attachment 85012
drm/nv50: Fix backlight not working when PWM_DIV is uninitialised (v2)
V2 fixes the reach of this patch.
>From what I can tell the PWM_DIV is simply a divider for the initial PWM clock
>or something, it does not affect the scope of the duty cycle. I therefore
>assume 0x5
Created attachment 85010
drm/nv50: Fix backlight not working when PWM_DIV is uninitialised
Auke, Rick, Jesse: please test the attached patch. It should initialise
PWM_DIV on both boot and resume, solving your problems _if_ this routine
is called after running the initscripts. Please test to verify
(In reply to comment #36)
> Created attachment 68764 [details] [review]
> Enable the PANEL_BACKLIGHT_LEVEL GPIO
>
> Guys can you try the patch. It should apply against the latest nouveau tree
NACK on this patch: this particular pin should be driven by a PWM in
SOR, as indicated in 0xe100. Rather
(In reply to comment #41)
> What backlight driver is being used? Please post your dmesg. Are you booting
> with acpi_backlight=vendor ?
No, I am booting with the following command line:
[0.00] Command line: BOOT_IMAGE=/boot/vmlinuz-linux
root=UUID=d30907c8-9c00-4b4f-9dfb-b01990328a7a rw l
Created attachment 84974
DMESG kernel 3.10.10
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Title:
nouveau: dark screen after suspend/resume
Status in Acce
What backlight driver is being used? Please post your dmesg. Are you
booting with acpi_backlight=vendor ?
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Title:
This bug is still present.
[root@s094648 rick]# nvapeek 0xe100; nvapeek 0xe28c; nvapeek 0xe104 8; nvapeek
0xe280 8
e100: 001c1100
e28c: 0100
e104: 72266640 0441474b
e280: 4747
[root@s094648 rick]# systemctl suspend
[root@s094648 rick]# nvapeek 0xe100; nvapeek 0xe
Can someone confirm that this is fixed in newer kernels as Ben said it
should be?
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Title:
nouveau: dark screen
Forgot to include a link: https://bugs.launchpad.net/nouveau/+bug/921321
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Title:
nouveau: dark screen after sus
Skeggsb, someone has reported a bug similar to this on Launchpad.net in
Ubuntu and was wondering if you can give more information on this
potential fix and when it will be released...
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This bug is likely fixed in current nouveau kernel git.
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Title:
nouveau: dark screen after suspend/resume
Stat
this is NOT a duplicate of #1015297. The issue likely still exists
(although I am unable to test anymore as my laptop has been replaced)
** This bug is no longer a duplicate of bug 1015297
Screen partially darkened after suspend and resume in Xubuntu
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*** This bug is a duplicate of bug 1015297 ***
https://bugs.launchpad.net/bugs/1015297
Can you check bug #1015297 and see if that describes your issue? This
might be a duplicate...
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*** This bug is a duplicate of bug 1015297 ***
https://bugs.launchpad.net/bugs/1015297
** This bug has been marked a duplicate of bug 1015297
Screen partially darkened after suspend and resume in Xubuntu
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I couldn't get the git kernel, so I tried that patch against
linux-3.7-rc3. Unfortunately, it didn't change anything in my set up
(Elitebook 8530w, NVIDIA Corporation G96M [Quadro FX 770M] card).
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Created attachment 68764
Enable the PANEL_BACKLIGHT_LEVEL GPIO
Guys can you try the patch. It should apply against the latest nouveau
tree
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Still present in kernel 3.6.2, even with acpi_backlight=vendor
nouveau.force_post=1 and "Support for backlight control" disabled in the
kernel configuration.
The funny thing is that the display seem to come back at the right
brightness initially and then is changed to max brightness a second
after
(In reply to comment #32)
I confirm that this issue is present on the Thinkpad W510 with the
driver from kernel 3.6.0.
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The problem is still present in the git version of the driver.
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Title:
nouveau: dark screen after suspend/resum
It appears that even the blob was experiencing the same issue [1]
Affected blob 180.44, fixed in 180.60. I would expect that a specific
quirk was added to handle the issue
[1] http://www.bartromgens.org/wordpress/?p=274
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When is a fix for this expected?
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Title:
nouveau: dark screen after suspend/resume
Status in Accelerated Xorg
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xserver-xorg-video-nouveau (Ubuntu)
Status: New => Confirmed
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