[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

            Bug ID: 108514
           Summary: heavy screen flickering with Mobility Radeon X1600 and
                    kernel version onwards 3.13
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: werner.lueckel@googlemail.com

my laptop: HP Compaq nx9420
my grafic card:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
RV530/M56-P [Mobility Radeon X1600] (prog-if 00 [VGA controller])
screen resolution: 1680x1050@60.1

when booting UBUNTU "14.04.5 LTS, Trusty Tahr" kernel 3.13.0-160-generic
-> the screen is fine in text-mode and in grafic-mode; NO flickering.
boot-messages say:
[drm] Initialized radeon 2.36.0 ...

BUT,
when booting UBUNTU "18.04.1 LTS (Bionic Beaver)" kernel 4.15.0-36-generic
-> the screen starts heavy flickering as soon as the kernel-module "radeon.ko"
is loaded. The flickering continues in grafic-mode.
here the boot-messages say:
[drm] Initialized radeon 2.50.0 ...
so: this seems to be a new version of radeon.ko.

My question:
- is there a method or a 'hidden flag' to switch radeon.ko-2.50 back to the
  good behaviour of radeon.ko-2.16?

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Any chance you can narrow down when the regression occurred and bisect it using
git?  Please attach your dmesg output and xorg log (if using X).

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #2 from Werner Lueckel <werner.lueckel@googlemail.com> ---
Created attachment 142154
  --> https://bugs.freedesktop.org/attachment.cgi?id=142154&action=edit
dmesg Ubuntu14.04, Kernel3.13.0-160, radeon 2.36.0, screen O.K.

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #3 from Werner Lueckel <werner.lueckel@googlemail.com> ---
Created attachment 142155
  --> https://bugs.freedesktop.org/attachment.cgi?id=142155&action=edit
dmesg Ubuntu18.04, Kernel4.15.0-36, radeon 2.50.0, screen flickering

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #4 from Werner Lueckel <werner.lueckel@googlemail.com> ---
- I attached 2 dmesg-listings;
  booting Ubuntu14.04, Kernel3.13 -> screen is o.k.; no flickering
  booting Ubuntu18.04, Kernel4.15 -> screen flickers.
- no Xorg log since the flickering happens already in text-mode
- I did the following test (on Ubuntu18.04):
  . boot with radeon.modeset=0 (thus: disable radeon driver)
    -> screen o.k.; NO flickering
  . then sudo modprobe -v radeon modeset=1
    -> and the flickering starts ...

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #5 from Werner Lueckel <werner.lueckel@googlemail.com> ---
Created attachment 142156
  --> https://bugs.freedesktop.org/attachment.cgi?id=142156&action=edit
dmesg Ubuntu14.04, Kernel4.4.0-133, radeon 2.43.0, screen flickering

... and I found out that the screen-flickering already starts with
VERSION="14.04.5 LTS, Trusty Tahr"
kernel: 4.4.0-133-generic
radeon 2.43.0

see the attached dmesg14.04_4.4.0-133.txt

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #6 from Werner Lueckel <werner.lueckel@googlemail.com> ---
Additional Information:

- I have the same flickering screen with

  Debian Life CD: UBCD-life
    Linux version 3.16.0-4-586
    [drm] Initialized radeon 2.39.0 20080528

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #7 from Werner Lueckel <werner.lueckel@googlemail.com> ---
some more tests with different systems give the following table:

sorted by radeon-version
system                                kernel            radeon          result
-------------------------             -----------       --------       
--------
UBUNTU 14.04.5 LTS, Trusty Tahr       3.13.0-161        2.36.0          O.K.
puppy_tahr 6.0.5                      3.14.56           2.37.0          O.K.
puppy_slacko 6.3.2                    3.14.55           2.37.0          O.K
UBCD                                  3.16.0            2.39.0          FLICKER
puppy_xenialpup 7.5                   4.4.95            2.43.0          FLICKER
UBUNTU 14.04.5 LTS, Trusty Tahr       4.4.0-133         2.43.0          FLICKER
UBUNTU 18.04.1 LTS (Bionic Beaver)    4.15.0-36         2.50.0          FLICKER

so the problem seems to start with a radeon.ko driver > 2.37.0;
I wonder how the radeon-version 2.38.0 would work, but, so far, I havn't 
found a system including it.

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #8 from Werner Lueckel <werner.lueckel@googlemail.com> ---
more tests with flickering screen:

- check modelines "xvidtune -show -display :0"
  14.04 trusty (NO flickering)
  "1680x1050" 122.00 1680 1712 1776 1904 1050 1051 1054 1066 -hsync -vsync
  18.04.1 LTS (Flickering screen)
  "1680x1050" 122.00 1680 1712 1776 1904 1050 1051 1054 1066 -hsync -vsync
  -> exactly the same

- on 18.04.1 LTS 
  (1) with flickering grafic screen:
  repeatedly switch the screen-mode (xrandr): 
    to 1440x900 and back to 1680x1050
  -> typically after 2...5 repetitions the screen is o.k. and stops flickering

  (2) BUT: when the screen awakes from "sleep" -> the flickering starts again!
      switch to text-console (F1) -> flickers too!
      switch back to grafic (F7) -> flickering continues

   the I may continue with (1) 
   OR (frustrated): 
   BOOT 14.04 trusty; which still works fine; excellent grafic; never flickers;
   ... and start working!

- BUT: what can I do when support for "14.04 trusty" ends?

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #9 from Werner Lueckel <werner.lueckel@googlemail.com> ---
(In reply to Alex Deucher from comment #1)
> Any chance you can narrow down when the regression occurred and bisect it
> using git?  Please attach your dmesg output and xorg log (if using X).

I tried to narrow down the flickering issue making several tests; see my
comments below.

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #10 from Werner Lueckel <werner.lueckel@googlemail.com> ---
(In reply to Alex Deucher from comment #1)
> Any chance you can narrow down when the regression occurred and bisect it
> using git?  Please attach your dmesg output and xorg log (if using X).

... sorry, by comments are not below, but "above" ...

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #11 from Klaus Weiss <klaus.weiss@seznam.cz> ---
(In reply to Werner Lueckel from comment #8)
> 
> - BUT: what can I do when support for "14.04 trusty" ends?

Try radeon.new_pll=0

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #12 from Werner Lueckel <werner.lueckel@googlemail.com> ---
thank you for your tip, but radeon.new_pll=0 gives me
... radeon: unknown parameter 'new_pll' ignored
And: I cannot find 'new_pll' in 'modinfo -p radeon';
So new_pll seems to be (no longer?) a radeon parameter.

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #13 from Paul Dufresne <dufresnep@gmail.com> ---
I am comparing PLL values for a not flickering kernel:
Linux version 3.14.79-031479-generic
and version 4.15 (recent one):

Linux 4.15:
Flickering values
[    5.554557] [drm:radeon_compute_pll_avivo [radeon]] 122000 - 121980, pll
dividers - fb: 253.0 ref: 8, post 7
[  465.773119] [drm:radeon_compute_pll_avivo [radeon]] 122000 - 121980, pll
dividers - fb: 253.0 ref: 8, post 7
[  503.796178] [drm:radeon_compute_pll_avivo [radeon]] 122000 - 121980, pll
dividers - fb: 253.0 ref: 8, post 7

Linux version 3.14.79-031479-generic: no flickering
[4.250932] [drm:radeon_compute_pll_avivo], 12201, pll dividers - fb: 189.8 ref:
6, post 7
[  230.376566] [drm:radeon_compute_pll_avivo], 12201, pll dividers - fb: 189.8
ref: 6, post 7

122000 is about 10x 12201
I don't know what are these values, but it seems very different!

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version onwards 3.13

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #14 from Paul Dufresne <dufresnep@gmail.com> ---
I had determined that 3.15-rc2 was the first version where flickering appears.
I guess it could be related to:
https://lists.freedesktop.org/archives/dri-devel/2014-April/057800.html

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

Paul Dufresne <dufresnep@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|heavy screen flickering     |heavy screen flickering
                   |with Mobility Radeon X1600  |with Mobility Radeon X1600
                   |and kernel version onwards  |and kernel version 3.15rc2
                   |3.13                        |onward

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

Paul Dufresne <dufresnep@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://launchpad.net/bugs/
                   |                            |1791312

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #15 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143324
  --> https://bugs.freedesktop.org/attachment.cgi?id=143324&action=edit
Paul's dmesg with drm.debug=4 on kernel 3.14_79 (No flickering)

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #16 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143325
  --> https://bugs.freedesktop.org/attachment.cgi?id=143325&action=edit
Paul Dufresne's Xorg.0.log for k3.14.79 no_flickering

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #17 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143326
  --> https://bugs.freedesktop.org/attachment.cgi?id=143326&action=edit
dufresnep's dmesg for kernel 4.15.0-45-generic (Linux Mint) with drm.debug=4
with a lot of flickering

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #18 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143327
  --> https://bugs.freedesktop.org/attachment.cgi?id=143327&action=edit
dufresnep's Xorg.0.log for kernel 4.15.0-45 (Mint 19) with drm.debug=4 lots of
flickering

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #19 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143328
  --> https://bugs.freedesktop.org/attachment.cgi?id=143328&action=edit
dufresnep's dmesg for kernel 4.15.0-45-generic with drm.debug=0 with strangely
no flickering

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #20 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143329
  --> https://bugs.freedesktop.org/attachment.cgi?id=143329&action=edit
dufresnep's xorg log for kernel 4.15.0 with drm.debug=0 strangely without
flickering

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #21 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143330
  --> https://bugs.freedesktop.org/attachment.cgi?id=143330&action=edit
dmesg for kernel 5.0rc5 with flickering and debug=4

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 692 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=108514

Paul Dufresne <dufresnep@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dufresnep@gmail.com

--- Comment #22 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143331
  --> https://bugs.freedesktop.org/attachment.cgi?id=143331&action=edit
Xorg.0.log for kernel 50rc5 with flickering

flickering had began only when in graphics mode ... usually begins while text
display at boot

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 369 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #23 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143332
  --> https://bugs.freedesktop.org/attachment.cgi?id=143332&action=edit
dufrp's Xorg.0.log for kernel 5.0rc5 (xstart as root) with no flickering

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 366 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #24 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143333
  --> https://bugs.freedesktop.org/attachment.cgi?id=143333&action=edit
dufrp's dmesg for kernel 5.0rc5 (xstarted as root) with no flickering

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 337 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #25 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143334
  --> https://bugs.freedesktop.org/attachment.cgi?id=143334&action=edit
output of sudo dmidecode > dmidecode.txr

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 343 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #26 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143335
  --> https://bugs.freedesktop.org/attachment.cgi?id=143335&action=edit
sudo lspci -nnvvk > lspci_while_flickering.txt

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

Paul Dufresne <dufresnep@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=97986

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #27 from Paul Dufresne <dufresnep@gmail.com> ---
I have done a git bisect:
client@client-LIFEBOOK-AH531 ~/mylinux $ git bisect good
f8a2645ecede4eaf90b3d785f2805c8ecb76d43e is the first bad commit
commit f8a2645ecede4eaf90b3d785f2805c8ecb76d43e
Author: Christian König <christian.koenig@amd.com>
Date:   Wed Apr 16 11:54:21 2014 +0200

    drm/radeon: improve PLL params if we don't match exactly v2

    Otherwise we might be quite off on older chipsets.

    v2: keep ref_div minimum

    Signed-off-by: Christian König <christian.koenig@amd.com>

:040000 040000 a2150329e19966a1eb911d1d1ac74e865f002b1b
7220bfcf2fad7f94f071376fdd5aedd3d358545c M      drivers
client@client-LIFEBOOK-AH531 ~/mylinux $

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #28 from Paul Dufresne <dufresnep@gmail.com> ---
client@client-LIFEBOOK-AH531 ~/mylinux $ git bisect log
# bad: [a798c10faf62a505d24e5f6213fbaf904a39623f] Linux 3.15-rc2
# good: [c9eaa447e77efe77b7fa4c953bd62de8297fd6c5] Linux 3.15-rc1
git bisect start 'v3.15-rc2' 'v3.15-rc1' '--' 'drivers/gpu/drm/radeon'
# good: [681941c1790b92207334d08ee017007685f35438] drm/radeon: fix VCE fence
command
git bisect good 681941c1790b92207334d08ee017007685f35438
# skip: [8902e6f2b832e00e10c6f9e9532f6f63feb4972f] drm/radeon: Improve
vramlimit module param documentation
git bisect skip 8902e6f2b832e00e10c6f9e9532f6f63feb4972f
# bad: [bcddee29b0b87af3aeda953840f97b356b24dc5e] drm/radeon/ci: make sure mc
ucode is loaded before checking the size
git bisect bad bcddee29b0b87af3aeda953840f97b356b24dc5e
# bad: [f8a2645ecede4eaf90b3d785f2805c8ecb76d43e] drm/radeon: improve PLL
params if we don't match exactly v2
git bisect bad f8a2645ecede4eaf90b3d785f2805c8ecb76d43e
# good: [74073c9dd29905645feb6dee03c144657a9844cd] drm/radeon: memory leak on
bo reservation failure. v2
git bisect good 74073c9dd29905645feb6dee03c144657a9844cd
# first bad commit: [f8a2645ecede4eaf90b3d785f2805c8ecb76d43e] drm/radeon:
improve PLL params if we don't match exactly v2
client@client-LIFEBOOK-AH531 ~/mylinux $

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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[-- Attachment #1.1: Type: text/plain, Size: 324 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #29 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143368
  --> https://bugs.freedesktop.org/attachment.cgi?id=143368&action=edit
git show of firt bad commit

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #30 from Paul Dufresne <dufresnep@gmail.com> ---
The following patch seems to work for me:
client@client-LIFEBOOK-AH531 ~/Téléchargements $ diff -u
old/linux-4.19.21/drivers/gpu/drm/radeon/radeon_display.c
linux-4.19.21/drivers/gpu/drm/radeon/radeon_display.c
--- old/linux-4.19.21/drivers/gpu/drm/radeon/radeon_display.c   2019-02-12
13:47:27.000000000 -0500
+++ linux-4.19.21/drivers/gpu/drm/radeon/radeon_display.c       2019-02-14
15:29:37.743229474 -0500
@@ -921,12 +921,14 @@
        ref_div_max = max(min(100 / post_div, ref_div_max), 1u);

        /* get matching reference and feedback divider */
-       *ref_div = min(max(DIV_ROUND_CLOSEST(den, post_div), 1u), ref_div_max);
+       // was: *ref_div = min(max(DIV_ROUND_CLOSEST(den, post_div), 1u),
ref_div_max);
+       *ref_div = min(max((den/post_div), 1u), ref_div_max);
        *fb_div = DIV_ROUND_CLOSEST(nom * *ref_div * post_div, den);

        /* limit fb divider to its maximum */
        if (*fb_div > fb_div_max) {
-               *ref_div = DIV_ROUND_CLOSEST(*ref_div * fb_div_max, *fb_div);
+               // was: *ref_div = DIV_ROUND_CLOSEST(*ref_div * fb_div_max,
*fb_div);
+               *ref_div = (*ref_div * fb_div_max) / (*fb_div);
                *fb_div = fb_div_max;
        }
 }
client@client-LIFEBOOK-AH531 ~/Téléchargements $

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #31 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143381
  --> https://bugs.freedesktop.org/attachment.cgi?id=143381&action=edit
.config file specifically for Compaq NX9420 on linux 4.19.21

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 349 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #32 from Paul Dufresne <dufresnep@gmail.com> ---
Created attachment 143413
  --> https://bugs.freedesktop.org/attachment.cgi?id=143413&action=edit
patch radeon-display.c for latest kernel (5.0.0-rc7)

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #33 from Werner Lueckel <werner.lueckel@googlemail.com> ---
Thanks to Paul Dufresne a patch in "radeon_display.c" seems to fix the bug.
So the radeon maintainers should work on an upstream fix.

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

Werner Lueckel <werner.lueckel@googlemail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |bisected, patch

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #34 from Werner Lueckel <werner.lueckel@googlemail.com> ---
Is there any chance to get the patch implemented into 18.04 LTS?
The flickering screen is really annoying ...

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

Werner Lueckel <werner.lueckel@googlemail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|unspecified                 |DRI git

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #35 from sandy jiil <bholeshankar1992crax@gmail.com> ---
Whatsapp is well known messenger app.It is used worldwide for messaging when we
download status from it we can face problem. By the use of this site
https://downloadstatus.xyz we can download it for free.

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

Paul Dufresne <dufresnep@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #36 from Paul Dufresne <dufresnep@gmail.com> ---
The patch is included in:
Linux 4.14.125
Linux 4.19.50
Linux 5.1.9

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

Kati K <statuslife55@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |https://statuslife.in/

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

--- Comment #37 from Kati K <statuslife55@gmail.com> ---
thank you for your tip, we can face a problem. Can I use free this

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|https://statuslife.in/      |

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

BugFinder <gajoro5546@mail1web.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |VERIFIED

--- Comment #38 from BugFinder <gajoro5546@mail1web.org> ---
Try to restore your system. <a hrefs="https://www.songslyricsfree.com/">
Songslyricsfree</a>

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[Bug 108514] heavy screen flickering with Mobility Radeon X1600 and kernel version 3.15rc2 onward

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https://bugs.freedesktop.org/show_bug.cgi?id=108514

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|VERIFIED                    |RESOLVED

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