{"id":89957,"date":"2020-07-27T13:42:24","date_gmt":"2020-07-27T11:42:24","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-okonnogo-menedzhera-xfwm4-4-14-3"},"modified":"2020-07-27T13:42:24","modified_gmt":"2020-07-27T11:42:24","slug":"obnovlenie-okonnogo-menedzhera-xfwm4-4-14-3","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/obnovlenie-okonnogo-menedzhera-xfwm4-4-14-3","title":{"rendered":"Atualiza\u00e7\u00e3o do gerenciador de janelas xfwm4 4.14.3.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Publicado<\/a><\/noindex> lan\u00e7amento do gerenciador de janelas xfwm4 4.14.3<\/a><\/noindex>, utilizado no ambiente de usu\u00e1rio Xfce para garantir a exibi\u00e7\u00e3o de janelas na tela, decora\u00e7\u00e3o de janelas e organiza\u00e7\u00e3o de seu movimento, fechamento e redimensionamento. <\/p>\n

Na nova vers\u00e3o foi adicionada<\/a><\/noindex> suporte \u00e0 extens\u00e3o X11 XRes<\/a><\/noindex> (X-Resource), que \u00e9 acionado<\/a><\/noindex> para solicitar ao servidor X informa\u00e7\u00f5es sobre o PID do aplicativo executado usando mecanismos de isolamento de sandbox. O suporte ao XRes resolve o problema do encerramento for\u00e7ado de processos clientes travados, cujos PIDs n\u00e3o podem ser conhecidos atrav\u00e9s da propriedade _NET_WM_PID, pois este reflete o identificador do processo dentro de um ambiente isolado, que pode ser diferente do identificador no espa\u00e7o de nomes global. <\/p>\n

Na nova vers\u00e3o tamb\u00e9m no lan\u00e7amento<\/a><\/noindex> uma vulnerabilidade que pode levar a acessar uma \u00e1rea de mem\u00f3ria j\u00e1 liberada (use-after-free) e grava\u00e7\u00e3o de dados fora do buffer alocado ao processar strings com configura\u00e7\u00f5es. Al\u00e9m disso, no xfwm4 4.14.3 foram adicionados<\/a><\/noindex> tratadores de erros adicionais XError, facilitando o diagn\u00f3stico de problemas relacionados a solicita\u00e7\u00f5es XConfigureWindow.<\/p>\n

Alguns usu\u00e1rios ap\u00f3s a atualiza\u00e7\u00e3o para a vers\u00e3o 4.14.3 come\u00e7aram a observar<\/a><\/noindex> crashes ao tentar iniciar no FreeBSD, que aparentemente surgem devido \u00e0 nova vincula\u00e7\u00e3o ao libXres. Al\u00e9m disso, no xfwm4 surgiu<\/a><\/noindex> um problema com a detec\u00e7\u00e3o de placas de v\u00eddeo AMD ao ativar a extens\u00e3o X11 XPresent para sincroniza\u00e7\u00e3o de sa\u00edda com o pulso de atraso de quadro (vblank). O XPresent era ativado quando o nome do cart\u00e3o continha a m\u00e1scara AMD, enquanto alguns cart\u00f5es s\u00e3o nomeados<\/a><\/noindex> \u00abRadeon\u00bb sem mencionar a palavra \u00abAMD\u00bb (por exemplo, \u00abRadeon RX 570\u00bb). Para essas placas, o processador vblank baseado em \u00abglx\u00bb foi ativado, o que apresenta um desempenho notavelmente inferior.<\/p>\n

Por exemplo, ao usar glx, a reprodu\u00e7\u00e3o de v\u00eddeo 4K no mpv carrega a GPU em 70% em modo de alta qualidade e 50% em modo de baixa qualidade, enquanto a carga ao usar XPresent diminui para 50% e 30%, respectivamente, o que impacta significativamente o consumo de energia e a performance. O problema ainda n\u00e3o foi corrigido. Para for\u00e7ar a ativa\u00e7\u00e3o do XPresent, \u00e9 poss\u00edvel adicionar a configura\u00e7\u00e3o \/general\/vblank_mode no xfconf:<\/p>\n

xfconf-query -c xfwm4 -p \/general\/vblank_mode -t string -s \u00abxpresent\u00bb \u2014create<\/p>\n

<\/a><\/noindex><\/p>\n

Fonte: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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