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From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 109887] vega56 undervolting/overclocking voltage issues
Date: Wed, 31 Jul 2019 04:05:50 +0000	[thread overview]
Message-ID: <bug-109887-502-WP0imI3iIM@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-109887-502@http.bugs.freedesktop.org/>


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https://bugs.freedesktop.org/show_bug.cgi?id=109887

--- Comment #8 from Andrew Sheldon <asheldon55@gmail.com> ---
I also can confirm the problem, and it seems to have gotten worse since
5.3.0-rcX.

In past kernels, you could kind of work around it by setting slightly less
conservative undervolts and it would work. If you go past a certain point (a
point that works fine if the pp table is overridden), it would wrap around to
1.2V. For reference this around 950mv at state 6/7.

Now with 5.3, even that same relatively conservative undervolt would
immediately jump to 1.2V under load.

As hagar-dunor suggested, manually overriding the entire PP table, works around
the problem.

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  parent reply	other threads:[~2019-07-31  4:05 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-06  8:06 [Bug 109887] vega56 undervolting/overclocking voltage issues bugzilla-daemon
2019-03-06  8:08 ` bugzilla-daemon
2019-03-06  8:10 ` bugzilla-daemon
2019-03-06 14:52 ` bugzilla-daemon
2019-03-06 15:45 ` bugzilla-daemon
2019-04-07 14:48 ` bugzilla-daemon
2019-06-07 22:10 ` bugzilla-daemon
2019-06-20 13:38 ` bugzilla-daemon
2019-07-31  4:05 ` bugzilla-daemon [this message]
2019-07-31  9:16 ` bugzilla-daemon
2019-07-31 10:43 ` bugzilla-daemon
2019-10-13 18:26 ` bugzilla-daemon
2019-10-13 20:05 ` bugzilla-daemon
2019-10-23 14:40 ` bugzilla-daemon
2019-10-23 14:41 ` bugzilla-daemon
2019-10-23 14:59 ` [Bug 109887] [Vega10][powerplay] P7 gets reset to max_vddc (1.2V/1.25V) after applying any custom settings via pp_od_clk_voltage and/or pp_table bugzilla-daemon
2019-10-24  9:53 ` bugzilla-daemon
2019-10-28 22:00 ` bugzilla-daemon
2019-10-31 13:05 ` bugzilla-daemon

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