Re: [REGRESSION] Panther Lake 8086:b082 internal eDP black after xe takeover since 7.1.6, still present in 7.1.8
Jani Nikula <[email protected]>
| Newsgroups | org.freedesktop.lists.intel-gfx,dev.linux.lists.regressions,org.freedesktop.lists.intel-xe,org.kernel.vger.stable |
|---|---|
| Organization | Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs Bertel Jungin Aukio 5, 02600 Espoo, Finland |
| Message-ID | <[email protected]> |
On Fri, 14 Aug 2026, Sasha Levin <[email protected]> wrote: >> 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. Please try [1]. BR, Jani. [1] https://lore.kernel.org/r/[email protected] -- Jani Nikula, Intel