Re: [REGRESSION] Panther Lake 8086:b082 internal eDP black after xe takeover since 7.1.6, still present in 7.1.8
Sasha Levin <[email protected]>
| Newsgroups | org.freedesktop.lists.intel-xe,dev.linux.lists.regressions,org.freedesktop.lists.intel-gfx,org.kernel.vger.stable |
|---|---|
| Message-ID | <[email protected]> |
> Known good: 7.1.5-arch1-2
> First known bad: 7.1.6-arch1-1
> Latest tested bad: 7.1.8
>
> When the xe driver takes over from the firmware framebuffer, the
> internal panel becomes completely black.
> Close and reopen the laptop lid.
> The internal panel starts working normally.
Thanks for the report. I believe the culprit is 2ee8dbd880b1 ("drm/i915/cdclk:
Fix up CDCLK_FREQ_DECIMAL without a full PLL re-enable"), which is in 7.1.6.
Mainline is affected in exactly the same way and there is no fix upstream yet,
so there is nothing for me to pick up.
--
Thanks,
Sasha