From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7312A2C9D for ; Fri, 3 Dec 2021 11:20:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1638530429; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=TCEoUW7+u756imTky0jSFPok8S0L4DifBezJf8rr5n4=; b=PuS6xFLxV1vCf/2kAn99xhjNTYMHbJO95+YgxuqiWzRXiP3/g3t9TNP/O9pBORi5NbGdNf i786d9QN9f7IRte6OldhBEumTNRfVHymOI72iykO8de2uX13jAlNzx7DJQou+OxIF0lv6r DrMuasb/H1Pq1Y9D3QAECJWgxZOStF0= Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-42-YnBlVXtiP926QrK9Te5OOw-1; Fri, 03 Dec 2021 06:20:28 -0500 X-MC-Unique: YnBlVXtiP926QrK9Te5OOw-1 Received: by mail-wr1-f69.google.com with SMTP id v17-20020adfedd1000000b0017c5e737b02so533915wro.18 for ; Fri, 03 Dec 2021 03:20:28 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=TCEoUW7+u756imTky0jSFPok8S0L4DifBezJf8rr5n4=; b=S+IzwBUh/HOFAPNr9+NZUod9OFSn7BOYDK6cP+N4MFe6ylXf7WY5F6H31aFKidXr6A 7pNEgXU9/PTLfQe10VAPfkbdmbQbCWwiq+dPsY4uY8dVx1tkghZmacqexgSqB8bfztqM idkXIp2pabb1BVB6h3WO1XK8OdU/3C0uYo2AkGaHKQS9ourMb9IGwdEEhZ3Wx+til5jQ xaFVyTjdFdQF5PbiNTamKubof8jLBUArMeRTMGp9P+lU9P8tCo8eUKa4qfakh+g60bO4 NEC6Pmh3Gfjtt5YgKLffZFIgNU4j8HY55+okj0IDhfMcH47woFJmWwzc4lXbrBSzXi2Y vkOg== X-Gm-Message-State: AOAM533S5PdrWzxNet+aT+2NBTy2zRmtPZlQ5K+203aftQfRayhrbhqV NJH+eQDvFcbEyy6BIYC55pHo5xzC/o46KfRQIjQ0Hf+RwXE8VFYZfVhHqq7/iH64o6/Ol9+MK7N Anf++0gMrojgSJqf3aodzY9k= X-Received: by 2002:adf:edc6:: with SMTP id v6mr21051554wro.461.1638530427173; Fri, 03 Dec 2021 03:20:27 -0800 (PST) X-Google-Smtp-Source: ABdhPJwJM87rlYiWw2QEKek+Z+Eku0ybwl3FqjSXdx/b5RzJmEzD14yUo8rrlrytrDw1uCbfb3NIDA== X-Received: by 2002:adf:edc6:: with SMTP id v6mr21051531wro.461.1638530426960; Fri, 03 Dec 2021 03:20:26 -0800 (PST) Received: from [192.168.1.102] ([92.176.231.205]) by smtp.gmail.com with ESMTPSA id o12sm2667241wmq.12.2021.12.03.03.20.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 03 Dec 2021 03:20:26 -0800 (PST) Message-ID: <5de368f7-91cd-5998-9fe4-1bf448e32742@redhat.com> Date: Fri, 3 Dec 2021 12:20:25 +0100 Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.3.0 Subject: Re: 5.15 regression: CONFIG_SYSFB_SIMPLEFB breaks console scrolling To: Thorsten Leemhuis , Harald Dunkel Cc: Kernel Mailing List , dri-devel@lists.freedesktop.org, Thomas Zimmermann , "regressions@lists.linux.dev" References: <4bf94684-6410-db9f-5bec-ea0540a2ea76@leemhuis.info> From: Javier Martinez Canillas In-Reply-To: <4bf94684-6410-db9f-5bec-ea0540a2ea76@leemhuis.info> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=javierm@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sorry for the late reply. On 11/21/21 12:47, Thorsten Leemhuis wrote: > Hi, this is your Linux kernel regression tracker speaking. > > On 16.11.21 05:52, Harald Dunkel wrote: >> >> if I enable CONFIG_SYSFB_SIMPLEFB in 5.15.2 and use grub's default >> configuration >> (Debian sid amd64), then a few lines at the bottom of /dev/tty1 including >> login prompt are off-screen. Scrolling is broken. I can login, though. >> >> Enabling GRUB_TERMINAL=console in grub doesn't make a difference. Using >> the same kernel except for CONFIG_SYSFB_SIMPLEFB the problem is gone. >> >> Graphics card is a GeForce GTX 1650. I tried with both CONFIG_DRM_NOUVEAU >> and proprietary graphics drivers disabled. >> >> Attached you can find the config file. Please mail if I can help to track >> this problem down. > > Thx for the report. I'm not totally sure if this is a regression, as > that's a new config option. But it might be one considered a successor > to an older one, hence it might count as regression. Adding two > developers and a mailing list to the CC, hopefully someone can clarify. > I don't think this is a regression since enabling CONFIG_SYSFB_SIMPLEFB will make the simpledrm driver to be bound while disabling the option makes the efifb driver to be bound instead. Yes, it seems to be a bug in the simpledrm driver but the solution if you have issues with the simpledrm is to not enable CONFIG_SYSFB_SIMPLEFB and keep using the old fbdev driver. Best regards, -- Javier Martinez Canillas Linux Engineering Red Hat