On Mon, Dec 8, 2025 at 8:46 PM Pillai, Aurabindo <[email protected]> wrote: > > [AMD Official Use Only - AMD Internal Distribution Only] > > Hi Mikhail, > > The log you uploaded is a little too long, and has quite a few errors, which > makes it hard to pinpoint the errors that are of interest to us. Could you > please drm.debug=0x116 to kernel cmdline, run "sudo dmesg -C" to clear all > the logs, then perform the hotplug, and capture the dmesg log? > > Looking at the regression patch, there are two new hunks that change the > early return logic, which is causing the regression. Could you check if you > need both the hunks removed for fixing the issue, or only one of those hunks ?
Hi Aurabindo, Regarding your question about the hunks: I have so far only tested a full revert of commit 3471b9a31ce3, which fixes the issue. I will perform additional tests to verify if reverting only one of the hunks (either in read_scdc_caps or write_scdc_data) is sufficient to resolve the regression, and I will get back to you with the results. The attached dmesg.zip contains the log captured with drm.debug=0x116 as requested. -- Best Regards, Mike Gavrilov.
<<attachment: dmesg.zip>>
