On Wed, 26 Feb 2025 16:02:04 +0100, Greg KH wrote: > > On Wed, Feb 26, 2025 at 03:40:07PM +0100, Takashi Iwai wrote: > > On Wed, 26 Feb 2025 15:35:34 +0100, > > Greg KH wrote: > > > > > > On Wed, Feb 26, 2025 at 03:26:44PM +0100, Greg KH wrote: > > > > On Wed, Feb 26, 2025 at 09:20:20AM -0500, Chuck Lever wrote: > > > > > On 2/26/25 9:16 AM, Takashi Iwai wrote: > > > > > > On Wed, 26 Feb 2025 15:11:04 +0100, > > > > > > Chuck Lever wrote: > > > > > >> > > > > > >> On 2/26/25 3:38 AM, Takashi Iwai wrote: > > > > > >>> On Sun, 23 Feb 2025 16:18:41 +0100, > > > > > >>> Chuck Lever wrote: > > > > > >>>> > > > > > >>>> On 2/23/25 3:53 AM, Takashi Iwai wrote: > > > > > >>>>> [ resent due to a wrong address for regression reporting, sorry! ] > > > > > >>>>> > > > > > >>>>> Hi, > > > > > >>>>> > > > > > >>>>> we received a bug report showing the regression on 6.13.1 kernel > > > > > >>>>> against 6.13.0. The symptom is that Chrome and VSCode stopped working > > > > > >>>>> with Gnome Scaling, as reported on openSUSE Tumbleweed bug tracker > > > > > >>>>> https://bugzilla.suse.com/show_bug.cgi?id=1236943 > > > > > >>>>> > > > > > >>>>> Quoting from there: > > > > > >>>>> """ > > > > > >>>>> I use the latest TW on Gnome with a 4K display and 150% > > > > > >>>>> scaling. Everything has been working fine, but recently both Chrome > > > > > >>>>> and VSCode (installed from official non-openSUSE channels) stopped > > > > > >>>>> working with Scaling. > > > > > >>>>> .... > > > > > >>>>> I am using VSCode with: > > > > > >>>>> `--enable-features=UseOzonePlatform --enable-features=WaylandWindowDecorations --ozone-platform-hint=auto` and for Chrome, I select `Preferred Ozone platform` == `Wayland`. > > > > > >>>>> """ > > > > > >>>>> > > > > > >>>>> Surprisingly, the bisection pointed to the backport of the commit > > > > > >>>>> b9b588f22a0c049a14885399e27625635ae6ef91 ("libfs: Use d_children list > > > > > >>>>> to iterate simple_offset directories"). > > > > > >>>>> > > > > > >>>>> Indeed, the revert of this patch on the latest 6.13.4 was confirmed to > > > > > >>>>> fix the issue. Also, the reporter verified that the latest 6.14-rc > > > > > >>>>> release is still affected, too. > > > > > >>>>> > > > > > >>>>> For now I have no concrete idea how the patch could break the behavior > > > > > >>>>> of a graphical application like the above. Let us know if you need > > > > > >>>>> something for debugging. (Or at easiest, join to the bugzilla entry > > > > > >>>>> and ask there; or open another bug report at whatever you like.) > > > > > >>>>> > > > > > >>>>> BTW, I'll be traveling tomorrow, so my reply will be delayed. > > > > > >>>>> > > > > > >>>>> > > > > > >>>>> thanks, > > > > > >>>>> > > > > > >>>>> Takashi > > > > > >>>>> > > > > > >>>>> #regzbot introduced: b9b588f22a0c049a14885399e27625635ae6ef91 > > > > > >>>>> #regzbot monitor: https://bugzilla.suse.com/show_bug.cgi?id=1236943 > > > > > >>>> > > > > > >>>> We received a similar report a few days ago, and are likewise puzzled at > > > > > >>>> the commit result. Please report this issue to the Chrome development > > > > > >>>> team and have them come up with a simple reproducer that I can try in my > > > > > >>>> own lab. I'm sure they can quickly get to the bottom of the application > > > > > >>>> stack to identify the misbehaving interaction between OS and app. > > > > > >>> > > > > > >>> Do you know where to report to? > > > > > >> > > > > > >> You'll need to drive this, since you currently have a working > > > > > >> reproducer. > > > > > > > > > > > > No, I don't have, I'm merely a messenger. > > > > > > > > > > Whoever was the original reporter has the ability to reproduce this and > > > > > answer any questions the Chrome team might have. Please have them drive > > > > > this. I'm already two steps removed, so it doesn't make sense for me to > > > > > report a problem for which I have no standing. > > > > > > > > Ugh, no. The bug was explictly bisected to the offending commit. We > > > > should just revert that commit for now and it can come back in the > > > > future if the root-cause is found. > > > > > > > > As the revert seems to be simple, and builds here for me, I guess I'll > > > > have to send it in. {sigh} > > > > > > > > Takashi, thanks for the report and the bisection, much appreciated. > > > > > > Now sent: > > > https://lore.kernel.org/r/2025022644-blinked-broadness-c810@gregkh > > > > Thanks Greg! > > > > Let's continue hunting the cause before 6.14 release, meanwhile. > > I'd prefer that the revert land in Linus's tree first and I can take the > revert from there for the stable releases, otherwise it's going to be a > mess once 6.14-final is released :( Ah, I thought your patch were for stable-only, but it was for mainline. Let's see how it goes. thanks, Takashi
