From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 87682] Horizontal lines in radeon driver on kernel 3.15 and
upwards
Date: Wed, 04 May 2016 22:13:39 +0000
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Date: Wed, 4 May 2016 22:13:39 +0000
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https://bugs.freedesktop.org/show_bug.cgi?id=87682
--- Comment #8 from Chris Bainbridge ---
> As far as I understand; 3.15.0-rc2-00077-g76e7745 is a later revision (good)
> than 3.15.0-rc2-00069-g1aae31c (bad)
This is not correct. The 77/69 does not imply a linear ordering because of
forks:
$ git merge-base --is-ancestor 3.15.0-rc2-00069-g1aae31c
3.15.0-rc2-00077-g76e7745; echo $?
1
Trust git ;-)
> c2fb3094669a3205f16a32f4119d0afe40b1a1fd is the first bad commit
Not familiar with this code, but from the patch the PLL values are printed out:
DRM_DEBUG_KMS("%d - %d, pll dividers - fb: %d.%d ref: %d, post %d\n",
freq, *dot_clock_p * 10, *fb_div_p, *frac_fb_div_p,
ref_div, post_div);
So suggest enabling debug log and compare those two lines from a working and
non-working kernel.
It should also be trivial to checkout a recent tag and revert the bad commit
(there is a conflict but just delete the avivo_get_fb_ref_div function to
resolve it).
--
You are receiving this mail because:
You are the assignee for the bug.
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Date: Wed, 4 May 2016 22:13:39 +0000
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Comment # 8
on bug 87682
from Chris Bainbridge
> As far as I understand; 3.15.0-rc2-00077-g76e7745 is a later revision (good)
> than 3.15.0-rc2-00069-g1aae31c (bad)
This is not correct. The 77/69 does not imply a linear ordering because of
forks:
$ git merge-base --is-ancestor 3.15.0-rc2-00069-g1aae31c
3.15.0-rc2-00077-g76e7745; echo $?
1
Trust git ;-)
> c2fb3094669a3205f16a32f4119d0afe40b1a1fd is the first bad commit
Not familiar with this code, but from the patch the PLL values are printed out:
DRM_DEBUG_KMS("%d - %d, pll dividers - fb: %d.%d ref: %d, post %d\n",
freq, *dot_clock_p * 10, *fb_div_p, *frac_fb_div_p,
ref_div, post_div);
So suggest enabling debug log and compare those two lines from a working and
non-working kernel.
It should also be trivial to checkout a recent tag and revert the bad commit
(there is a conflict but just delete the avivo_get_fb_ref_div function to
resolve it).
You are receiving this mail because:
- You are the assignee for the bug.
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