• Performance Issues with latest DRM

    From Ben Hutton@ben@benhutton.com.au to muc.lists.freebsd.ports on Sat Jan 3 11:02:40 2026
    From Newsgroup: muc.lists.freebsd.ports


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    Hi,

    Since I upgraded the drm drivers about a week ago I=E2=80=99ve been =
    having issues. Either I can get XFCE performing correctly with the Intel =
    GPU or suspend but not both. I was able to roll back to and older =
    Current version 1600004 and get old versions of the DRM drivers =
    installed which get it working. Basically it was been about a week of =
    painful trial and error working out what is going on.

    1. XFCE is unusably slow when switching to laptop only screen. It works = perfectly when using an external screen. Being a hybrid graphics laptop = I=E2=80=99m assuming the Intel drivers aren=E2=80=99t working and the =
    Nvidia is working perfectly fine.
    2. If using XFCE suspend no longer works.=20

    Curiously it seem to work ok on KDE Plasma 6.=20

    I=E2=80=99m currently running Current with drm-66-kmod and the =
    equivalent Nvidia drivers. Curiously installing older versions of the =
    Nvidia drivers will get XFCE performing better however it then breaks = suspend. I=E2=80=99m suspecting something is going wrong with the =
    switchover from Nvidia to intel drivers. Quite often when you disconnect =
    the external screen you get a black screen on the laptop where the mouse = still works but nothing else. I=E2=80=99ve had this before when hybrid = graphics mode is not working correctly. If I plug in the and disconnect =
    the external screen it tends to work the second time. This wasn=E2=80=99t = happening before.

    Before updating the DRM drivers it was working very well with XFCE with = suspend working most of the time.

    Is there a way I can work out what is actually failing. I=E2=80=99ve =
    looked in /var/log/messages but so far haven=E2=80=99t found any errors =
    that would give any idea of what=E2=80=99s going on.


    Ben Hutton
    ben@benhutton.com.au
    0434 211 939






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    <html aria-label=3D"message body"><head><meta http-equiv=3D"content-type" = content=3D"text/html; charset=3Dutf-8"></head><body =
    style=3D"overflow-wrap: break-word; -webkit-nbsp-mode: space; =
    line-break: after-white-space;">Hi,<div><br></div><div>Since I upgraded =
    the drm drivers about a week ago I=E2=80=99ve been having issues. Either =
    I can get XFCE performing correctly with the Intel GPU or suspend but =
    not both. I was able to roll back to and older Current version 1600004 =
    and get old versions of the DRM drivers installed which get it working. = Basically it was been about a week of painful trial and error working =
    out what is going on.</div><div><br></div><div>1. XFCE is unusably slow =
    when switching to laptop only screen. It works perfectly when using an = external screen. Being a hybrid graphics laptop I=E2=80=99m assuming the = Intel drivers aren=E2=80=99t working and the Nvidia is working perfectly = fine.</div><div>2. If using XFCE suspend no longer = works.&nbsp;</div><div><br></div><div>Curiously it seem to work ok on =
    KDE Plasma 6.&nbsp;</div><div><br></div><div>I=E2=80=99m currently =
    running Current with drm-66-kmod and the equivalent Nvidia drivers. =
    Curiously installing older versions of the Nvidia drivers will get XFCE = performing better however it then breaks suspend. I=E2=80=99m suspecting = something is going wrong with the switchover from Nvidia to intel =
    drivers. Quite often when you disconnect the external screen you get a =
    black screen on the laptop where the mouse still works but nothing else. = I=E2=80=99ve had this before when hybrid graphics mode is not working = correctly. If I plug in the and disconnect the external screen it tends =
    to work the second time. This wasn=E2=80=99t happening = before.</div><div><br></div><div>Before updating the DRM drivers it was = working very well with XFCE with suspend working most of the = time.</div><div><br></div><div>Is there a way I can work out what is =
    actually failing. I=E2=80=99ve looked in /var/log/messages but so far = haven=E2=80=99t found any errors that would give any idea of what=E2=80=99=
    s going on.</div><div><br></div><div><br><div>
    <div dir=3D"auto" style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, =
    0); letter-spacing: normal; text-align: start; text-indent: 0px; = text-transform: none; white-space: normal; word-spacing: 0px; = -webkit-text-stroke-width: 0px; text-decoration: none; overflow-wrap: = break-word; -webkit-nbsp-mode: space; line-break: =
    after-white-space;"><div dir=3D"auto" style=3D"caret-color: rgb(0, 0, =
    0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; = text-indent: 0px; text-transform: none; white-space: normal; =
    word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
    none; overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: = after-white-space;"><div>Ben = Hutton</div><div>ben@benhutton.com.au</div><div>0434 211 = 939</div><div><br></div></div><br = class=3D"Apple-interchange-newline"></div><br = class=3D"Apple-interchange-newline"><br =
    class=3D"Apple-interchange-newline">
    </div>

    <br></div></body></html>=

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