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([2a02:a03f:be69:3200:82e8:2cff:fe51:d2c8]) by smtp.gmail.com with ESMTPSA id v8-20020a05600c214800b0038ec51d544csm1383043wml.27.2022.04.14.01.04.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 14 Apr 2022 01:04:39 -0700 (PDT) Message-ID: <1bcb195c-8c84-3641-7784-e7b7578bb40f@gmail.com> Date: Thu, 14 Apr 2022 10:04:38 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: commit 15512021eb3975a8c2366e3883337e252bb0eee5 causes white spots in console screens Content-Language: fr-moderne To: "Lisovskiy, Stanislav" References: <0da21aec-d299-1834-99f3-9a598e4649f7@gmail.com> <87v8vcgb63.fsf@intel.com> <20220414063139.GA31013@intel.com> <9d497fb9-4504-9e64-1d7f-9353cf96624c@gmail.com> <20220414080312.GA31389@intel.com> From: =?UTF-8?Q?Fran=c3=a7ois_Valenduc?= In-Reply-To: <20220414080312.GA31389@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Le 14/04/22 à 10:03, Lisovskiy, Stanislav a écrit : > On Thu, Apr 14, 2022 at 08:33:35AM +0200, François Valenduc wrote: >> Le 14/04/22 à 08:31, Lisovskiy, Stanislav a écrit : >>> On Wed, Apr 13, 2022 at 08:12:20PM +0300, Jani Nikula wrote: >>>> On Wed, 13 Apr 2022, François Valenduc wrote: >>>>> Commit 15512021eb3975a8c2366e3883337e252bb0eee5 >>>>> (15512021eb3975a8c2366e3883337e252bb0eee5) causes a lof of white spots >>>>> to appears on the right upper corner of all console screens (see >>>>> https://drive.google.com/file/d/13GabEvOIKSAj5yox6ybAZEDu3Ixncw5Q/view). >>>>> git-bisect shows that this is the offending commit and if I revert it, >>>>> the problem goes away. The problem still occurs with kernel 5.18-rc2 and >>>>> to all stable trees where it was applied. >>>>> Can somebody explains what happens ? >>>>> >>>>> The video card is the following: VGA compatible controller: Intel >>>>> Corporation WhiskeyLake-U GT2 [UHD Graphics 620] (rev 02) (prog-if 00 >>>>> [VGA controller]) >>>>> >>>>> Please tell me if you need more info. >>>> That's commit 15512021eb39 ("drm/i915: Workaround broken BIOS DBUF >>>> configuration on TGL/RKL"), adding Cc's. >>>> >>>> Please file a report at fdo gitlab [1] and attach dmesg etc. there. >>> That commit looks like it is just disabling all the planes, if wrong >>> dbuf/wm configuration is detected. >>> However it should do that only once during boot as I understand. >>> >>> Are you sure that is exactly this commit which is causing this? >>> Does the issue appear always? >>> >>> Ville Syrjälä, thoughts? >>> >>> Stan >>> >>>> Thanks, >>>> Jani. >>>> >>>> >>>> [1] https://gitlab.freedesktop.org/drm/intel/wikis/How-to-file-i915-bugs >>>> >>>> >>>> -- >>>> Jani Nikula, Intel Open Source Graphics Center >> As I said, git-bisect shows it's the offending commit and if I revert it, >> the problem doesn't happens. Otherwise, it always occurs. >> >> François >> > Does it just happen all the time or some steps/certain circumstances needed > for it to happen? > > Only suspicion after looking briefly is that once suspend/resume is done > it might be messing something up. Just a quick guess.. > > Stan It occurs permantently as soon as I boot my computer.