On Mon, Oct 9, 2023 at 4:45 PM Bagas Sanjaya <bagasdotme@xxxxxxxxx> wrote: > > On Mon, Oct 09, 2023 at 09:27:02AM +0800, Huacai Chen wrote: > > Hi, all, > > > > On Tue, Sep 26, 2023 at 10:31 PM Huacai Chen <chenhuacai@xxxxxxxxxx> wrote: > > > > > > Hi, all, > > > > > > On Tue, Sep 26, 2023 at 7:15 PM Linux regression tracking (Thorsten > > > Leemhuis) <regressions@xxxxxxxxxxxxx> wrote: > > > > > > > > [CCing the regression list, as it should be in the loop for regressions: > > > > https://docs.kernel.org/admin-guide/reporting-regressions.html] > > > > > > > > Hi, Thorsten here, the Linux kernel's regression tracker. > > > > > > > > On 13.09.23 14:02, Jaak Ristioja wrote: > > > > > > > > > > Upgrading to Linux 6.5 on a Lenovo ThinkPad L570 (Integrated Intel HD > > > > > Graphics 620 (rev 02), Intel(R) Core(TM) i7-7500U) results in a blank > > > > > screen after boot until the display manager starts... if it does start > > > > > at all. Using the nomodeset kernel parameter seems to be a workaround. > > > > > > > > > > I've bisected this to commit 60aebc9559492cea6a9625f514a8041717e3a2e4 > > > > > ("drivers/firmware: Move sysfb_init() from device_initcall to > > > > > subsys_initcall_sync"). > > > > > > > > Hmmm, no reaction since it was posted a while ago, unless I'm missing > > > > something. > > > > > > > > Huacai Chen, did you maybe miss this report? The problem is apparently > > > > caused by a commit of yours (that Javier applied), you hence should look > > > > into this. > > > I'm sorry but it looks very strange, could you please share your config file? > > As confirmed by Jaak, disabling DRM_SIMPLEDRM makes things work fine > > again. So I guess the reason: > > Did Jaak reply privately? It should have been disclosed in public > ML here instead. Yes, he replied privately, and disabling DRM_SIMPLEDRM was suggested by me. > > > > > When SIMPLEDRM takes over the framebuffer, the screen is blank (don't > > know why). And before 60aebc9559492cea6a9625f ("drivers/firmware: Move > > sysfb_init() from device_initcall to subsys_initcall_sync") there is > > no platform device created for SIMPLEDRM at early stage, so it seems > > also "no problem". > > I don't understand above. You mean that after that commit the platform > device is also none, right? No. The SIMPLEDRM driver needs a platform device to work, and that commit makes the platform device created earlier. So, before that commit, SIMPLEDRM doesn't work, but the screen isn't blank; after that commit, SIMPLEDRM works, but the screen is blank. Huacai > > Confused... > > -- > An old man doll... just what I always wanted! - Clara
